Our latest publications

• Abe, K.; Abe, S.; Abhir, J.; Abhishek, A.; Acciari, V. A. & Acero, F. [Show all 362 contributors for this article] (2026). Constraints on the VHE Counterpart of Two Binary Black Hole Mergers Observed by the MAGIC and CTAO LST-1 Telescopes. Publications of the Astronomical Society of the Pacific. ISSN 0004-6280. 138(8), p. 1–25. doi: 10.1088/1538-3873/ae8a7e. Full text in Research Archive
• Danieli, Krubeal & Lepperød, Mikkel Elle (2026). Flexible navigation with neuromodulated cognitive maps. PLoS Computational Biology. ISSN 1553-734X. 22(7), p. 1013487–1013487. doi: 10.1371/journal.pcbi.1013487. Full text in Research Archive Show summary

  Animals develop specialized cognitive maps during navigation, constructing environmental representations that facilitate efficient exploration and goal-directed planning. The hippocampal CA1 region is implicated as the primary neural substrate for cognitive mapping, housing spatially tuned cells that adapt based on behavioral patterns and internal states. Computational approaches to modeling these biological systems have employed various methodologies. Although labeled graphs with local spatial information and deep neural networks have provided computational frameworks for spatial navigation, significant limitations persist in modeling one-shot adaptive mapping. We introduce a biologically inspired place cell architecture that develops cognitive maps during exploration of novel environments. Our model implements a simulated agent for reward-driven navigation that forms spatial representations online. The architecture incorporates behaviorally relevant information through neuromodulatory signals that respond to environmental boundaries and reward locations. Learning combines rapid Hebbian plasticity, lateral competition, and targeted modulation of place cells. Analysis of the model across a variety of environments demonstrates that online map formation and reward-directed navigation can emerge within a single simulated trial, without the multi-epoch training typically required by reinforcement-learning approaches. The simulation results show that the agent successfully explores and navigates to target locations in various environments, adapting when reward positions change. Analysis of neuromodulated place cells reveals dynamic changes in neuronal density and place field size after behaviorally significant events. These findings align with experimental observations of reward effects on hippocampal spatial cells while providing computational support for the efficacy of biologically inspired approaches to cognitive mapping.

• Totland, Lasse; Bendiksen, Bård Andre; Nordén, Einar Sjaastad; Hauge-Iversen, Ida Marie; Bergo, Kaja Knudsen & Zhang, Lili [Show all 8 contributors for this article] (2026). Strain Rate Angle Distribution as an Indicator of Post-Infarct Myocardial Remodeling: Proof-of-Concept of a Novel Application of the MRI Derived Strain Rate Tensor Field. Magnetic Resonance in Medicine. ISSN 0740-3194. p. 1–14. doi: 10.1002/mrm.70607. Full text in Research Archive
• Lunde, Jenny; Anderson, E.K.; Bartulović, P.; Baudot, J.; Berdalović, I. & Dorokhov, A. [Show all 13 contributors for this article] (2026). Exploring effects of geometrical parameters for CASSIA, a monolithic sensor with internal amplification. Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment. ISSN 0168-9002. 1091. doi: 10.1016/j.nima.2026.171784. Full text in Research Archive Show summary

  Tracking in future High Energy Physics collider experiments requires high timing and high spatial resolution while keeping the material budget low. The CMOS Active SenSor with Internal Amplification (CASSIA) project addresses these requirements by developing a monolithic CMOS sensor with internal amplification. The sensor is designed to have two operational modes, a low gain amplification region with a gain in the range of 10–100 before breakdown, and a single photon avalanche mode with gain in the order of 1000 after breakdown. In this article, changes to the gain layer radius and implant structures are analyzed, showing a difference in breakdown voltage of tens of volts depending on implant structures and gain layer radius. Dark count rates also show a clear dependence on the combination of n+-electrode and gain layer implants.

• Pernegger, H.; Anderson, E.K.; Bartulović, P.; Berdalović, I.; Brown, M. Giroux de Foiard & Haberl, S. [Show all 11 contributors for this article] (2026). First results of a monolithic active pixel sensor with internal signal gain fully integrated in a 180 nm CMOS technology. Journal of Instrumentation (JINST). 21. doi: 10.1088/1748-0221/21/05/p05022. Full text in Research Archive Show summary

  Dense tracking environments in experiments at CERN's High-Luminosity LHC and future FCC experiments call for an increased use of timing information in addition to the position measurement of pixel detectors. This adds one dimension to the information available, and is essential for pile-up mitigation at high luminosity. The CASSIA sensor project ( C MOS A ctive S en S or with I nternal A mplification) focuses on the development of pixel matrices with internal charge multiplication, based on monolithic CMOS sensor technologies, suitable for application as charged particle tracking and timing detectors. CMOS sensors with in-pixel internal amplification would provide higher signal amplitudes, an improved signal-to-noise ratio, better time resolution and increased sensitivity, making them attractive for high-radiation environments. Their monolithic integration in small pixels reduces the parallel capacitance presented to a front-end amplifier and the power dissipation making it suitable for fine-pitch low-power detectors. Fast signal rise time due to internal charge amplification improves the response time and timing resolution, all of which make such a technology attractive for future 4D tracking applications in HEP experiments. This paper presents the first results of the CASSIA sensor, a novel MAPS which uses gain layers fully integrated in a 180nm imaging process to achieve internal signal amplification. In the first measurements presented here we demonstrate the gain behaviour of different pixel implant designs and show that the sensor can be operated as LGAD sensor with low gain in proportional mode at lower voltages and as SPAD sensor at higher voltages.

• Chang, Christopher Jackson; Farmer, Benjamin; Fowlie, Andrew & Kvellestad, Anders (2026). Exact inference from noisy simulations in collider physics. Physical Review D. ISSN 2470-0010. 113(7). doi: 10.1103/2d39-gsjp. Full text in Research Archive
• Stange, Marit Synnøve Sæverud; Bumke, Lars; Quandt, Eckhard; Kušnír, Jakub; Grabec, Tomáš & Seiner, Hanuš [Show all 11 contributors for this article] (2026). Screening for new elastocaloric materials in a compositionally graded NiCuTiZr thin film. Materialia. 50, p. 1–16. doi: 10.1016/j.mtla.2026.102896. Full text in Research Archive Show summary

  NiTi-based shape memory alloys can be used as the active material in elastocaloric cooling devices. For optimal performance, they should simultaneously exhibit high reversibility and low temperature hysteresis, which can be achieved by ensuring that the middle eigenvalue of the primary stretch matrix λ2=1. Also, an adequate transformation temperature and a high enthalpy of transformation are required. In this study, a systematic screening for highly reversible shape memory alloys was performed, using compositionally graded Ni-Cu-Ti-Zr thin films generated by magnetron sputtering. Based on experimental data from the literature, a model predicting λ2 from the quaternary film compositions indicated a range of targeted compositions with λ2=1. The properties of the thin-film compositions were experimentally investigated to corroborate the theoretical possibilities. Martensitic phase transformations were observed with differential scanning calorimetry, demonstrating a systematic change in transformation temperatures with composition. X-ray diffraction confirmed a transition between B2 austenite and B19’ martensite structures, similar to binary NiTi compounds. The targeted compositions did not exhibit the expected temperature-driven phase transformations with low hysteresis. Tensile testing revealed superelastic behaviour, but the samples were intrinsically brittle with large hysteresis and mechanical instability. This was explained by phase separation and the formation of Ti2Ni- and Ni4Ti3-like minority phases. Despite the failure to demonstrate new shape memory alloys with high reversibility, the study suggests a path to efficient searches for new alloys with novel functional properties.

• Grandcolas, Mathieu; Løvoll, Marte; Dahl, Øystein; Thøgersen, Annett; Svenum, Ingeborg-Helene & Wenckstern, Holger Von [Show all 7 contributors for this article] (2026). Rapid thermal processing of photoanodes for solar water splitting: status, challenges and opportunities. Solar Energy Materials and Solar Cells. ISSN 0927-0248. 309, p. 1–9. doi: 10.1016/j.solmat.2026.114728. Full text in Research Archive Show summary

  Rapid thermal processing (RTP) is gaining attention as an efficient alternative to conventional annealing of materials for photoelectrochemical (PEC) water splitting. By delivering ultrafast heating and precise temperature control, RTP introduces non-equilibrium conditions that enable metastable phase formation, defect engineering, and interfacial control, while preserving transparent conductive oxides (TCOs) essential for PEC architectures. These advantages improve crystallinity, activate dopants, and enhance interfacial quality without the drawbacks of prolonged furnace treatments. Recent studies report two- to fourfold increases in photocurrent density and negative onset potential shifts up to 300 mV for RTP-treated photoanodes, highlighting RTP's potential to accelerate PEC performance toward industrial benchmarks. Despite these advantages, RTP remains underutilized in PEC research, with challenges in process optimization, atmosphere control, and scalability still unresolved. This review summarizes current progress on RTP for several oxide photoanodes, compares its performance with that of conventional annealing processes, and discusses mechanistic insights. Future directions include hybrid thermal strategies, real-time diagnostics, and data-driven design to enable scalable PEC device manufacturing and sustainable solar hydrogen production.

• Reis, Paula Kozlowski Pitombeira; Flekkøy, Eirik Grude; Toussaint, Renaud & Måløy, Knut Jørgen (2026). Linear response theory of front back-contraction during a single Haines jump. Journal of Fluid Mechanics. ISSN 0022-1120. 1041. doi: 10.1017/jfm.2026.11960. Full text in Research Archive Show summary

  We study the linear response of a fluid–fluid interface in a porous medium subjected to a localised, transient perturbation. A single pore is driven out of mechanical equilibrium by a small displacement, initiating a back-contraction of the interface. Assuming negligible total flow, the interface relaxes with a time- and space-dependent profile h(x,t), modelled for a flat geometry. This set-up reflects conditions achievable experimentally using a localised heterogeneity in pore-throat sizes. We determine the evolving interface shape during the relaxation process, together with the associated pressure and velocity fields, using both analytical calculations and pore-network simulations.

• Mikheenko, Pavlo (2026). Artificial quantum brain: A bold proposal. Low Temperature Physics. ISSN 1063-777X. 52(7), p. 900–904. doi: 10.1063/10.0044252. Full text in Research Archive Show summary

  The paper discusses the possibility of building an elemental unit of an artificial quantum brain using self-assembly, featuring resonant synchronization and the spontaneous development of an action-potential response to coherent electromagnetic radiation. This unit will be suitable for incorporation into bionic robotic systems and/or natural biological organisms. It is proposed that the unit be formed through the self-assembly of superconducting microtubules on a rigid polymer scaffolding, with a spatial periodicity of 9 μm, to allow synchronization by infrared radiation at this wavelength, making it compatible with the natural brains of biological organisms. The paper describes the available experiments on the controlled self-assembly of such microtubules. Additionally, it suggests methods for training the artificial brain unit and exploring its emerging quantum consciousness.

• Ali, Ahmed Farag; Inan, Nader; Laukkonen, Ruben & Mikheenko, Pavlo (2026). A Coherence–Dissipation Framework for Brain Dynamics and Consciousness. Entropy. 28(10). doi: 10.3390/e28101074. Full text in Research Archive Show summary

  We develop a theoretical proposal linking vacuum stability and brain dynamics through superconductivity-inspired coherence, symmetry reduction, and the thermodynamic stabilization of low-entropy regimes. We take an unbroken SU(3) structure as a candidate stable residue of the low-temperature vacuum. At the neural level, we formulate a coarse-grained analog in which a two-fluid model with dissipative and coherence-supporting components describes brain dynamics. Specifically, the coherence-supporting component is proposed as a possible basis for the efficient binding and integration required to sustain a stable, unified conscious state. The proposal offers a common geometric language for relating physics and neuroscience with falsifiable signatures in coherence and state-dependent transitions. The main technical contribution is a computational algebraic model of conscious-state dynamics, where neural data are mapped to reconstructed state trajectories. Effective generators are inferred from those trajectories, and the two-fluid split is tested as a Cartan–root decomposition of su(3), with a rank-two commuting sector for coherence-preserving balance and six root directions for state transitions. This structure can be tested on neural data and contrasted with alternative dynamical models.

• Holen, Gaute Arnesson; Mishra, Rinku; Miyake, Y. & Miloch, Wojciech Jacek (2026). Ion trapping around small positively charged objects in magnetized plasma. Physics of Plasmas. ISSN 1070-664X. 33(5). doi: 10.1063/5.0309574. Full text in Research Archive Show summary

  We present a novel trapping mechanism for ions around small positively charged objects in magnetized plasma. Here, the Larmor radius is larger than the object, but approximately equal to the characteristic radial length of the object's electrostatic structure. The resulting steady state solution from state-of-the-art particle-in-cell simulations shows a bipolar electric field around the object, with a density enhancement in the quasi-neutral region. Test particle simulations explore the mechanism behind the ion trapping by focusing on single-particle-motion, and transforming the particles to gyro-center, Larmor radius space. We also observe a kinetic energy gradient in the quasi-neutral region, where the ions organize themselves with respect to distance from the object according to their velocity, where the gyro-centers of particles are nearly coincident with the object's position. This leads to a shift in the velocity distribution. Analysis of test particles' temporal evolution in the gyro-center, Larmor radius space reveals regions of instability and stability, which correspondwell with the density enhancement and ion depletion. The results are similar for spherical and cylindrical objects, suggesting that the trapping mechanism is fundamental. These findings have implications for understanding plasma interactions with small objects, with potential applications in space physics, fusion devices, and plasma diagnostics.

• Harris, Caley M.; Spyrou, Artemis; Denissenkov, Pavel; Herwig, Falk; Richard, Andrea L. & Uthayakumaar, Sivahami [Show all 23 contributors for this article] (2026). Influence of neutron-capture reactions on the nucleosynthesis of strontium. Communications Physics. 9(1). doi: 10.1038/s42005-026-02713-5. Full text in Research Archive Show summary

  The astrophysical intermediate neutron-capture process (i process) has been reinvoked in recent years to describe stellar observations that cannot be explained by the traditional nucleosynthesis processes. Despite its success, significant uncertainties still remain including the exact astrophysical conditions and site, as well as the nuclear physics input. Available i-process models strongly underproduce the abundance of strontium (Sr) compared to observational data, while successfully describing neighboring elements, like yttrium (Y) and zirconium (Zr). This discrepancy has been attributed to nuclear physics uncertainties, specifically to the unconstrained reaction rate of the neutron-capture on the isotope krypton-88. Here we present an experimental investigation of this reaction and show that our result provides a possible solution to the aforementioned Sr underproduction in i-process models.

• Camposano, Anthony Val Canillas; Hafreager, Anders; Malthe-Sørenssen, Anders & Sveinsson, Henrik Andersen (2026). Silica-water model using the Vashishta force field. Journal of Chemical Physics. ISSN 0021-9606. 165(10). doi: 10.1063/5.0343021. Full text in Research Archive
• Lange, Ewelina; Chimczak, Grzegorz; Kowalewska-Kudłaszyk, Anna; Thapliyal, Kishore & Peřina, Jan (2026). Improving quantum-battery charging via unidirectional quantum jumps to metastable state. Scientific Reports. 16(1). doi: 10.1038/s41598-026-56685-1. Full text in Research Archive Show summary

  In the process of charging a quantum battery, quantum jumps play a detrimental role because they induce transitions from higher to lower energy levels, leading to energy dissipation. This behavior directly opposes the fundamental objective of the charging protocol, which is to increase the population of higher-energy states and store usable energy in the system. Furthermore, decoherence introduced by randomness of quantum jumps leads to a mixed state, thereby reducing the amount of energy that can be extracted from the charged quantum battery. Here, we propose a quantum battery comprising an ensemble of three-level atoms in the Λ configuration to store energy in the metastable state over a long time. We demonstrate that, when spontaneous atomic transitions are restricted to occur solely from the excited state to a metastable state, with decay to the ground state completely suppressed, quantum jumps acquire a constructive character. Under these conditions, they drive the quantum battery to a fully charged state, render the entire stored energy extractable, and shorten the duration of the second stage of the charging protocol.

• Suski, Damian M.; Cywińska, Maria; Winnik, Julianna; Józwik, Michał; Zdańkowski, Piotr & Ahmad, Azeem [Show all 8 contributors for this article] (2026). Uncertainty-Aware Bayesian Computational Imaging for Single-Shot Widefield Interferometric Nanometrology. Laser & Photonics reviews. ISSN 1863-8880. 20(12). doi: 10.1002/lpor.202503158. Full text in Research Archive Show summary

  Widefield interferometry offers non-destructive, scalable nanometrology for semiconductor photonics, but prevailing pipelines require multi-frame scanning (or phase-shifting) and postprocessing of reconstructed noise-limited phase, and do not provide single-shot, geometry-level uncertainties. We introduce an uncertainty-aware Bayesian computational imaging framework that estimates semiconductor waveguide geometry (e.g., height and width) directly from a single widefield interferogram, coupling an end-to-end intensity forward model with Dynamic Nested Sampling to return full posterior distributions and model evidence. Operating in the intensity domain avoids noise transfer to reconstructed topography and remains reliable under low-signal and sub-pixel fringe-shift conditions. Working in a widefield mode is a vital advantage of our Bayesian method, due to fully developed statistics over many pixels in a large field of view, significantly reducing the estimation uncertainties. We successfully validate performance in simulations showing sub-nanometer height precision and nanometric width accuracy, and in experiments on a metrologically certified 15 nm calibration step and a rib waveguide (design height 8 nm). The framework is model-agnostic and, given an appropriate forward model and priors, is in principle extendable to other nanostructures. By unifying single-shot acquisition with probabilistic inference, we establish Bayesian computational nanometrology as a potential route to widefield, uncertainty-quantified measurements for semiconductor nanophotonics and process-level monitoring.

• Kern, Vanessa R.; Moura, Marcel; Olsen, Pål E. S. & Carlson, Andreas (2026). Patterning surface textured plates with a viscoplastic fluid. Physical Review Fluids. 11(9). doi: 10.1103/1jz3-5j4d. Full text in Research Archive Show summary

  The deposition of a viscoplastic fluid onto a substrate can be achieved by moving apart two plates initially separated by a fluid-filled gap, where the footprint shape depends on the initiation of a fingering instability. Here, we present an approach for controlled deposition of a viscoplastic fluid by designing the macroscopic structure of the solid substrate. Through experiments in a lifted Hele-Shaw cell, we explore how slot, square, pyramid, and triangular patterns affect the dynamics of liquid deposition. The substrate structures directly control the symmetry and final shape of the deposited viscoplastic footprint, while having little systematic influence on the maximal normal adhesive force or on the force-gap scaling exponents once the total entrapped volume is accounted for through an effective initial gap. We develop a scaling description for the normal force of a Herschel–Bulkley fluid, showing that the measured force decay reflects a superposition of capillary, yield stress, and viscous contributions. For experiments producing stable patterning, the measured effective exponents are consistent with the theoretical range predicted by this model. Finally, we interpret the pattern-selection mechanism through a dynamical permeability analysis where the substrate texture creates an anisotropic permeability field whose angular maxima correlate with the preferred inward propagation directions of the invading air. Our results highlight a direct link between substrate geometry, interfacial dynamics, and the final deposited morphology, showing how millimetric deposition patterns can be programed using submillimetric surface structures.

• Kransberg, Jonas Moe; Bråthen, Anne Cecilie Sjøli; Falch, Emilie Sogn; Øverbye, Knut Eiliv Ødegård; Garrido, Pablo F. & Fjell, Anders Martin [Show all 10 contributors for this article] (2026). Failure to detect entorhinal grid-like signals in a passive navigation human fMRI study. Imaging Neuroscience. 4. doi: 10.1162/imag.a.1196. Full text in Research Archive Show summary

  Abstract Grid cells in the human entorhinal cortex (EC) play a critical role in spatial navigation and memory. The EC is also one of the first regions affected by ageing and Alzheimer’s disease. This pre-registered functional magnetic resonance imaging (fMRI) study aimed to detect grid-cell-like signals (GLS) in a passive virtual navigation task. Contrary to our hypotheses and previous findings, we did not observe significant GLS at a population level, even in younger participants. Further exploratory analyses investigated the impact of task-engagement, as inferred from object-location memory performance, and showed no relationship with GLS magnitude. We also examined potential influences of a confounding one-fold directional signal and various data-processing choices but observed no consistent patterns. Our findings, consistent with recent null results from similar studies, suggest that passive navigation paradigms may be insufficient for reliably eliciting grid-like signals in human fMRI.

• Holen, Gaute Arnesson; Mishra, Rinku; Miyake, Y. & Miloch, Wojciech Jacek (2026). Numerical method for dynamic dust charge in molecular dynamics simulations of laboratory and lunar dusty plasma environments. Physics of Plasmas. ISSN 1070-664X. 33(8), p. 083703-1–083703-14. doi: 10.1063/5.0320581. Full text in Research Archive
• Esteves, Duarte Magalhães; He, Ru; Bazioti, Kalliopi; Magalhães, Sérgio; Sequeira, Miguel Carvalho & Santos, Luís Filipe [Show all 11 contributors for this article] (2026). Microtubes and nanomembranes by ion-beam-induced exfoliation of β-Ga2O3. Surfaces and Interfaces. 88, p. 109066–109066. doi: 10.1016/j.surfin.2026.109066. Full text in Research Archive
• Finnerud, Ole Gunnar; Adli, Erik; Ariniello, R; Corde, S; Dalichaouch, T N & Emma, C [Show all 21 contributors for this article] (2026). First results from the E302 efficiency–instability experiment at the FACET-II facility. Journal of Physics: Conference Series (JPCS). ISSN 1742-6588. 3266(1). doi: 10.1088/1742-6596/3266/1/012001. Full text in Research Archive Show summary

  Abstract The beam-breakup (BBU) instability in plasma accelerators is seeded by a transverse offset between the driver and a trailing bunch. The BBU instability induces oscillations in the trailing bunch, which are detrimental to its beam quality. When the instability is large, assuming little mitigation from ion motion and energy spread, the beam suffers emittance growth, and charge can be kicked transversely out of the plasma channel. The detrimental effect on beam quality is substantially worse at high efficiencies, which places constraints on the achievable power efficiency in applications such as linear colliders, where maintaining the beam quality is required. In this paper, we present the first experimental signatures of the BBU instability in data taken in the E302 experiment at the FACET-II facility at SLAC National Accelerator Laboratory. We use a specific beam-optical setup and a novel method to probe for transverse instabilities on diagnostic screens downstream of a magnetic dipole spectrometer. We complement the analysis with full 3D particle-in-cell (PIC) simulations of the plasma interaction using similar driver and trailing bunch parameters on a simulated FACET-II spectrometer.

• Kvassheim, Monika; Hernes, Eivor; Berner, Kjetil; Bruland, Øyvind & Stokke, Caroline (2026). Combining whole-body clearance, blood activity concentrations, and SPECT images to explore the biodistribution of a novel [212Pb]Pb-PSMA-targeting therapy compared to a [177Lu]Lu-PSMA pharmacokinetic model. EANM Innovation. ISSN 3051-2913. 2. doi: 10.1016/j.eanmi.2026.100128. Full text in Research Archive Show summary

  Introduction The recently published phase 0 trial of 212Pb-labelled PSMA-targeting AB001 for metastatic castration-resistant prostate cancer (mCRPC) showed potential for further clinical development. Here we combined blood sample measurement, whole-body (WB) probe measurements, and SPECT/CT images to investigate the biodistribution of AB001. Methods Three mCRPC patients were imaged by SPECT/CT twice post-injection of 10 MBq AB001, and WB activity and whole blood, plasma, and red blood cell (RBC) activity concentrations of 212Pb and 212Bi (measured pre- and post-equilibrium) were sampled at four timepoints. A [177Lu]Lu-PSMA pharmacokinetic (PK) model was adapted to AB001 by changing physical half-lives and combining it with an International Commission on Radiological Protection (ICRP) model for unbound bismuth. The PSMA PK model was also altered by fitting to WB and plasma clearance. 212Pb liver, kidney, parotid gland, and blood activities measured from SPECT were compared to 212Pb in the respective model compartments or to samples. Results Activity concentration was 11 times higher in plasma than RBC. The 212Bi blood activity concentration was consistently lower than 212Pb. The adapted [177Lu]Lu-PSMA PK model indicated similar PK for AB001 in blood, but comparison with SPECT images suggested different biodistributions. Adjusting the excretion rate from the [177Lu]Lu-PSMA-617 PK model by fitting to AB001 WB clearance gave poorer fit between predicted and measured plasma activity than the unaltered model. Adjusting the PK model according to the plasma activities slightly improved the fit of the model to the WB clearance measurements compared to the unadjusted model, but the biodistribution differences compared to SPECT remained. Conclusions High in vivo stability of AB001 was indicated by combination of instant thin-layer chromatography measurements, comparison of plasma and RBC time-activity curves, and modelling of unbound 212Pb. While comparison of biokinetics of AB001 to [177Lu]Lu-PSMA indicated differences in biodistribution, there are considerable uncertainties in the approach, including use of population-based PK models, their applicability to AB001, and SPECT quantification.

• Kvassheim, Monika; Karlberg, Anna Maria; Blakkisrud, Johan & Stokke, Caroline (2026). Tumour-to-Kidney Absorbed Dose Ratios for Alpha-Emitter PRRTs Estimated with [177Lu]Lu-DOTATATE SPECT Images and Biokinetic Models: Patient Variations Impact Contribution from Redistributing Daughters. International Journal of Radiation Oncology, Biology, Physics. ISSN 0360-3016. doi: 10.1016/j.ijrobp.2026.08.073. Full text in Research Archive Show summary

  Introduction Biokinetics for potential alpha-emitter peptide receptor radionuclide therapies (PRRTs) were simulated to estimate tumour-to-kidney absorbed dose ratios for 225Ac, 227Th, 212Pb, 230U, 226Ac, 211At, and 149Tb. The impact of daughter redistribution was studied, along with the effects of differing biokinetics and modelling assumptions. Methods Post-injection whole body probe measurements and SPECT/CT images at five and four time points, respectively, of 14 patients receiving [177Lu]Lu-DOTATATE were used to estimate whole body, tumour, and kidney time-activity curves. Alpha-emitter PRRT biokinetics were estimated by adjusting time-activity curves by the physical half-lives of parent radionuclides. Daughter redistribution was included, assuming all alpha decays and separate scenarios with 0%, 16%, 36%, and 100% of beta decays released daughters to ICRP biokinetic models. The initial conditions of the biokinetic models were changed to assess the impact of modelling assumptions. The tumour-to-kidney absorbed dose ratios were compared. Variations between patients was assessed by coefficient of variation (CoV). Results Inter-patient variation in whole body time-integrated activities increased with physical half-life of the parent radionuclide. For 212Pb, 225Ac, and 227Th there was large inter-patient variation in kidney absorbed dose change when incorporating daughter redistribution (absolute CoV >40%), while for 226Ac and 230U it was consistent between patients (absolute CoV <3%). Modifying the distribution in the biokinetic models impacted the kidney absorbed dose, but different modifications impacted different decay chains. Tumour-to-kidney absorbed dose ratios tended to increase with parent half-life, but for some decay chains the effect of rate of daughter release from tumours was notable. Conclusion The trend for tumour-to-kidney absorbed dose ratios should be weighed against other important aspects for radionuclide therapies, and considered with the uncertainty in the underlying assumption of equivalent biokinetics. The large inter-patient variations resulting from daughter redistribution for 212Pb, 225Ac, and 227Th kidney absorbed doses underline the need for representative patient cohorts.

• Hellevang, Helge; Nooraiepour, Mohammad; Sednev-Lugovets, Anton & Dziadkowiec, Joanna (2026). Crystal Growth in Porous Media. InterPore Journal. 3(3). doi: 10.69631/9kd53x06. Full text in Research Archive Show summary

  Crystalline silicate minerals and carbonates make up 90% to 95% of the Earth's lithosphere, the rigid outermost shell comprising the crust and uppermost solid mantle. Crystalline materials are continuously modified by fluid–rock interactions including crystal growth occurring along fractures and within pore spaces. Crystals form under conditions dictated by extrinsic factors, such as temperature, pressure, fluid composition, and pore confinement, as well as intrinsic factors such as crystal structure, chemical bonding, and anisotropy. While the thermodynamic stability and structure of crystals are well established, their rates of heterogeneous nucleation and growth remain poorly constrained. This is particularly true in porous media, where nucleation is frequently a distinct and rate-limiting step rather than a negligible precursor to growth, especially where non-classical pathways preclude a single, well-defined interfacial free energy. In this commentary, we outline how crystal nucleation and growth in porous media control pore-scale structure, flow, and transport, and we evaluate how these processes can be represented in numerical models across scales. We examine the distinct roles of nucleation pathways, growth kinetics, interfacial and confinement effects, and crystallization pressure in governing transient porosity, stress localization, and self-organized crystalline networks. Furthermore, we discuss how fluid flow and mixing modulate where and when these processes occur. These principles are illustrated through examples spanning well-controlled synthetic crystal growth in materials science to geo-energy and geoscience applications, such as basaltic CO2 mineralization, where probabilistic nucleation, reactive transport, and evolving pore architecture jointly control macroscopic behavior. Finally, we assess the potential of machine learning and surrogate modeling approaches to bridge the persistent gap between molecular-scale mechanisms and field-scale predictions. By emphasizing mechanistic understanding over system-specific details, our goal is to help porous media scientists judge when crystallization is likely to matter, and to guide the selection of modeling approaches that remain both physically grounded and computationally tractable. WHY THIS PAPER MATTERS Crystal nucleation and growth can progressively clog pore spaces, redirect fluid pathways, and transform the mechanical and transport behavior of porous rocks across scales. Is it possible to use information we have about nanoscale processes to predict reservoir-scale changes? This InterPore Commentary article synthesizes how confinement, interfacial free energies, and crystallization pressures control where crystals appear, how fast they grow, and when they damage or seal flow networks in natural and engineered systems. It then outlines how machine learning can be used to connect molecular, pore, and field scales for predictive modeling.

• Retselis, Anastasios-Faidon; Knutsen, Elise Wright; Holdcroft, Sam; Viet, Shayla; Wahlén, Rebecka & Virdis, Mario [Show all 19 contributors for this article] (2026). CENSSAT-1: A space weather mission and an educational platform. In Detrell, Gisela; Alarcia, Ramón María García; Messina, Vincenzo & Kinnaird, Alexander (Ed.), Proceedings of the 5th Symposium on Space Educational Activities (SSEA). Technical University of Munich. p. 852–857. doi: 10.14459/2026MD1857465. Full text in Research Archive Show summary

  The Symposium on Space Educational Activities (SSEA), organised by the European Space Agency’s Education Office, provides a forum for university students, professionals working in education, and other professionals in industry or agencies to present and discuss their experiences organising, running and/or participating in Educational Activities related to Space. After successful past events in Padova (2015), Budapest (2018), Leicester (2019), and Barcelona (2022), the 5th SSEA was held in April 2026 (the 8th, 9th, and 10th) in the TUM Aerospace Campus in Willy-Messerschmitt-Strasse 5, Taufkirchen, Germany. The local organisation team was led by the Technical University of Munich (TUM), involving Professors, PostDocs, PhD Candidates, and Master’s and Bachelor’s students, in close collaboration with the Bavarian aerospace ecosystem partners.

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• Hansen, Alex (6). New class of thermodynamic functions to describe mixtures. Full text in Research Archive
• Ali, Ahmed Farag; Inan, Nader; Laukkonen, Ruben & Mikheenko, Pavlo (2026). Could meditation reveal an SU(3) symmetry shared by the observer and the universe? doi: https:/phys.org/news/2026-10-meditation-reveal-su3-symmetry-universe.html#google_vignette. Full text in Research Archive
• Krichevskiy, Daniil; Kolesova, Helena; Melkild, Halvor; Bringmann, Torsten & Pomper, Joachim (2026). Beyond 3→2: Towards Realistic SIMP Dark Matter. Full text in Research Archive Show summary

  Strongly interacting dark sectors with pseudo–Nambu–Goldstone bosons provide a versatile framework for sub-GeV dark matter. While the original SIMP paradigm emphasises number-changing 3 to 2 processes as the origin of the relic abundance, the phenomenology of pionic dark matter is considerably richer. Depending on the spectrum and couplings, the relic density can instead be controlled by 2 to 2 annihilations (WIMP-like regime), semi-annihilation channels involving vector mesons and further processes like \pi\pi\pi to \pi\rho. A consistent treatment therefore requires a framework that simultaneously captures pion dynamics, vector mesons, anomalous interactions, and portal effects. We consider QCD-like dark sectors in which the dark matter candidates are pions stabilized by unbroken dark flavor symmetries. The effective theory is formulated using the Hidden Local Symmetry (HLS) approach. The HLS Lagrangian, supplemented by the gauged Wess–Zumino–Witten term, is constructed in a representation-independent manner and is applicable to complex, real, and pseudo-real fermion theories. As a minimal benchmark, we focus on the pseudo-real symmetry-breaking pattern SU(2N_f)/Sp(2N_f) with Nf=2. We incorporate lattice results for Sp(N_c=4) to obtain realistic relations between m_\pi/f_\pi and m_\rho/m_\pi. A dark photon portal is included to maintain thermal equilibrium with the visible sector and to assess its impact on relic abundance and dark matter stability within the HLS framework.

• Reis, Paula Kozlowski Pitombeira; Moura, Marcel; Pierce, Kevin; Måløy, Knut Jørgen & Linga, Gaute (2026). Secondary imbibition in 2D porous media: The role of flow direction in trapping. Full text in Research Archive
• Reis, Paula Kozlowski Pitombeira; Flekkøy, Eirik Grude; Toussaint, Renaud & Måløy, Knut Jørgen (2026). Linear Response Theory of Front-Back Contraction During a Single Haines Jump. Full text in Research Archive
• Reis, Paula Kozlowski Pitombeira & Måløy, Knut Jørgen (2026). A Theoretical Model for Stable Drainage Fronts in 3D Porous Media. Full text in Research Archive
• Mikheenko, Pavlo (2026). A quantum description of nervous system. Full text in Research Archive
• Rukan, Isak Cecil Onsager; Gulla, Jan & Skaar, Johannes (2026). Truncating a photon. Full text in Research Archive
• Boukraa, Mohamed Aziz; Karabiyik, Yücel; Austeng, Andreas; Holm, Sverre & Näsholm, Sven Peter (2026). Improved Full-Waveform Inversion in Time-Harmonic Elastography. Full text in Research Archive
• Siem, Sunniva (2026). Presentation of The Norwegian Nuclear Research Centre (NNRC) and new BSc and MSc program in Nuclear Science. Full text in Research Archive
• Siem, Sunniva (2026). Collaboration meeting on Nuclear Technology Education in Norway (Welcome address). Full text in Research Archive
• Siem, Sunniva (2026). Norwegian Nuclear Research Centre. doi: https:/indico.global/event/16641/overview. Full text in Research Archive
• Siem, Sunniva & Pellegri, Luna (2026). Almost 15 years of fruitful Nuclear Physics collaboration between South Africa and Norway. Full text in Research Archive
• Siem, Sunniva (2026). Norwegian Nuclear Research Centre (NNRC) and Norwegian Nuclear Data Needs. Full text in Research Archive
• Siem, Sunniva (2026). Collaboration on Research and Education NNRC - IJC-Lab. Full text in Research Archive
• Siem, Sunniva (2026). Future fission experiments at the Oslo Cyclotron laboratory. doi: https:/workshops.ill.fr/event/549/overview. Full text in Research Archive
• Siem, Sunniva (2026). Norwegian Nuclear Research Centre (NNRC) and New BSc and MSc programs in Nuclear Technology. Full text in Research Archive
• Siem, Sunniva (2026). Norwegian Nuclear Research Centre - Nukleærsenteret. Full text in Research Archive
• Siem, Sunniva (2026). Kompetanse og utdanningstilbud ved UiO og Nukleærsenteret. doi: https:/www.uio.no/forskning/scene-domus-bibliotheca/arrangementer/2026/kjernekraft-i-norge. Full text in Research Archive Show summary

  Interessen for kjernekraft øker. Er Norge forberedt? Kom og hør hva fagmiljøene sier om kunnskapsstatus og kompetansebehov ved et eventuelt kjernekraftscenario i Norge.

• Siem, Sunniva & Stavik-Døvle, Grete (2026). Studieprogrammene i nukleære fag: Studentenes kompetanse når de begynner på masteroppgaven. Full text in Research Archive
• Meir, Michaela Georgine (2026). Vi har ekspertise på kjernekraft, men trenger flere hoder. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7451971874227408896. Full text in Research Archive Show summary

  Kristin Halvorsen vil ha mer kompetanse på kjernekraft i Norge. – God idé, svarer Nukleærsenteret.

• Meir, Michaela Georgine & Siem, Sunniva (2026). NNRC at Norway Life Science 2026. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7429176107171590144. Full text in Research Archive Show summary

  Last week at the Norway Life Science Conference in Oslo, leaders from across the Norwegian health sector and international research communities gathered to discuss how Norway can strengthen knowledge-based innovation and build a competitive life sciences industry.

• Tomkiv, Yevgeniya & Meir, Michaela Georgine (2026). 15 Years After Fukushima - Advancing Science & Global Collaboration. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7440366580175187968. Full text in Research Archive Show summary

  It is 15 years since a tsunami and earthquake devastated the coast of the Fukushima prefecture, and led to the accident at the Fukushima Daichi Nuclear Power Plant. A team led by NNRC's Deputy Director Prof. Deborah Oughton is currently visiting the Institute of Environmental Radioactivity at Fukushima University (IER) to attend the 12th Annual Symposium, “Fukushima Voices: 15 years of Nature and Humanity” (https://lnkd.in/egm5JVFz), and to discuss future collaboration in research and education.

• Lind, Ole Christian & Meir, Michaela Georgine (2026). Research highlight in NATURE: PNAS study on the sunken submarine Komsomolets. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7447250454100606976. Full text in Research Archive Show summary

  The study investigates the current status of the Soviet nuclear-powered submarine Komsomolets (K-278), which sank in the Norwegian Sea in 1989. Resting at a depth of 1,680 meters with both a nuclear reactor and two nuclear warheads on board, the wreck is a critical site for understanding long-term nuclear risks in the deep ocean.

• Paulsen, Wanja & Meir, Michaela Georgine (2026). 𝐒𝐭𝐫𝐞𝐧𝐠𝐭𝐡𝐞𝐧𝐢𝐧𝐠 𝐍𝐨𝐫𝐰𝐚𝐲’𝐬 𝐍𝐮𝐜𝐥𝐞𝐚𝐫 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: 𝐀 𝐉𝐨𝐢𝐧𝐭 𝐈𝐧𝐢𝐭𝐢𝐚𝐭𝐢𝐯𝐞 𝐛𝐲 𝐔𝐢𝐎, 𝐍𝐌𝐁𝐔, 𝐚𝐧𝐝 𝐃𝐒𝐀. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7449427917899522048. Full text in Research Archive Show summary

  On April 9th, the Norwegian Radiation and Nuclear Safety Authority, Direktoratet for strålevern og atomsikkerhet (DSA), hosted in collaboration with Universitetet i Oslo (UiO) (UiO) and NMBU - Norwegian University of Life Sciences a strategic workshop "Sammen om å øke den nasjonale kompetansen i nukleære fag" (Together to strengthen the national competence in nuclear subjects) at Radisson Blu Plaza Hotel focused on master’s student supervision in businesses in the nuclear sector.

• Al-Adili, Ali & Meir, Michaela Georgine (2026). Successful Fission Yield Measurement has been carried out at the LOHENGRIN spectrometer at ILL - Institut Laue Langevin. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7450130765411045377. Full text in Research Archive
• Meir, Michaela Georgine (2026). 10th anniversary of the Oslo Workshop on Nuclear Level Density and Gamma Strength. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7462823722547339264. Full text in Research Archive Show summary

  The 10th anniversary of the Oslo Workshop on Nuclear Level Density and Gamma Strength, organized by Norwegian Nuclear Research Centre and University of Oslo took place throughout the week of 18–22 May. The workshop was opened by the Dean of The Faculty of Mathematics and Natural Sciences, Solveig Kristensen, who highlighted developments in our research field, the impact of the Oslo Method, and NNRC's societal mission.

• Siem, Sunniva & Meir, Michaela Georgine (2026). Norwegian Nuclear Research Centre tildeler Yngve Vogt Forskningsformidlingsprisen 2026. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7511405177401307138. Show summary

  Under «Yngve Vogts uhøytidelige AFP-avskjedsarrangement» ved Universitetet i Oslo 29. september hadde vi gleden av å tildele Yngve Forskningsformidlingsprisen 2026.

• Meir, Michaela Georgine & Siem, Sunniva (2026). UiO and iThemba LABS: Formalizing a Decade of Scientific Collaboration. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7467550847309348864. Full text in Research Archive Show summary

  The University of Oslo officially renewed the research partnership with iThemba LABS in South Africa. This milestone is the second renewal of a collaboration that first began in 2017. As Deputy Director at iThemba LABS Dr. Rudolph Nchodu, pointed out, this is now one of the largest collaborations we have in terms of the number of people involved. The formal signing by Vice Dean Øystein Prytz and Deputy Director Rudolph Nchodu provides a solid framework for the next five years, giving our joint research and student exchange programs the stability needed.

• Meir, Michaela Georgine & Brynildsen, Elisabeth (2026). From nuclear physics to smarter cancer treatment. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7467945495009726464. Full text in Research Archive Show summary

  Nuclear technology master’s student Elisabeth Brynildsen defended her thesis on turning proton‑irradiated tantalum into new tools for cancer treatment and medical imaging. She investigates how to produce two promising isotopes, 177 Ta and 178Ta, and tests whether they could work for ultra‑precise therapy and SPECT scans. Her results add fresh data that can help develop safer and more effective radioactive drugs in the future.

• Theodossiou, Theodossis & Meir, Michaela Georgine (2026). Pioneering study on a small molecule called phenazine methosulfate (PMS). doi: https:/www.linkedin.com/feed/update/urn:li:activity:7472287357455650817. Full text in Research Archive Show summary

  Members of our Norwegian Nuclear Research Centre community have co‑authored a pioneering study on a small molecule called phenazine methosulfate (PMS). The work conducted on brain cancer cells shows that PMS can briefly “jump‑start” energy production, even when the respirational energy systems are blocked by drugs ...

• Meir, Michaela Georgine & Tokstad, Camilla Almli (2026). Advancing Cancer Treatment with Nuclear Physics. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7477303373604614144. Full text in Research Archive Show summary

  Camilla’s research, conducted at NNRC, Universitetet i Oslo (UiO) | University of Oslo and Berkeley Lab, provides a major boost for the future of targeted radionuclide therapy (TRT). Her work focused on the production of Antimony-119 (119Sb), a "perfect" candidate for cancer treatment because it emits Meitner–Auger electrons. These electrons deposit a high local dose of energy over a very short distance, allowing for the precise destruction of cancer cell DNA while sparing the surrounding healthy tissue.

• Meir, Michaela Georgine & Grieg, Claudia Emilia (2026). New Insights into Iodine: From Stellar Physics to Reactor Safety. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7477632298516127744. Full text in Research Archive Show summary

  In her master's thesis, Claudia Grieg performed the first indirect measurement of the 132I (n,g) 133I astrophysical reaction rate. Working at the Oslo Cyclotron Laboratory, she utilized the Oslo Method to identify a low-energy enhancement (upbend) and a pygmy dipole resonance in the nucleus of 133I. This data is crucial for accurately modeling the i-process, bringing us closer to solving the mystery of the origin of heavy elements in our universe.

• Meir, Michaela Georgine & Görgen, Andreas (2026). New Insights into the Shape of Neutron-Rich Nuclei. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7491108539730583552. Full text in Research Archive Show summary

  Just before summer William finished his master's degree studying the shape and structure of neutron-rich atomic nuclei. The work investigated excited states in the neutron-rich fission fragment ¹¹⁴Pd, measuring lifetimes in the picosecond range. The data were obtained in an experiment at GANIL in France, using the Advanced Gamma Tracking Array AGATA together with the VAMOS++ spectrometer, and analyzed using the recoil distance Doppler shift technique.

• Meir, Michaela Georgine (2026). Celebrating new research at NNRC! doi: https:/www.linkedin.com/feed/update/urn:li:activity:7503833920371621888. Full text in Research Archive Show summary

  After the summer break, we had several research achievements to celebrate at the Norwegian Nuclear Research Centre (NNRC) at the University of Oslo: Three papers have been published, including one in Nature, with another also featured in Phys.org News. Two more papers have been accepted for publication and two additional manuscripts have been submitted to Physical Review C. The published papers cover nuclear structure, properties of exotic nuclei, nuclear astrophysics and nuclear fission - reflecting the broad research activities within our centre.

• Meir, Michaela Georgine; Olafsen-Solberg, Iris & Vatnar:, Samanta (2026). One centre, many opportunities — studying nuclear science with NNRC. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7506654029847130113. Full text in Research Archive Show summary

  After completing their bachelor’s project together this spring, Iris Olafsen-Solberg and Samanta Vatnar have now started the NukTek master’s programme at the Department of Physics, University of Oslo. Their bachelor’s project combined nuclear physics at UiO with radiochemistry at NMBU - Norwegian University of Life Sciences and investigated the production and separation of technetium-95m (Tc-95m) for environmental monitoring.

• Paulsen, Wanja & Meir, Michaela Georgine (2026). Upcoming experiment with scientists from the University of Naples Federico II and the Università di Catania in Italy at OCL. doi: https:/lnkd.in/p/eTXjq6E9. Full text in Research Archive Show summary

  Last week, several scientists from the University of Naples Federico II and the Università di Catania in Italy visited the Norwegian Nuclear Research Centre and the Oslo Cyclotron Laboratory at the Universitetet i Oslo (UiO) | University of Oslo to prepare for an upcoming experiment. Through this collaboration, we will perform an alpha-scattering experiment on a magnesium target to investigate carbon-carbon fusion inside stars. When carbon fuses with carbon inside stars, magnesium becomes a gateway to elements such as neon and sodium. It is therefore very important to have a detailed understanding of the nuclear properties of magnesium. This gives us a better understanding of how the elements we and our Earth consist of were created

• Meir, Michaela Georgine & Hisanawi, Josef Ali Hasan (2026). From Maritime to Terrestrial Reactors: Making Better Use of Nuclear Fuel. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7510673513075142658/. Full text in Research Archive Show summary

  In his thesis, “Neutronic Analysis of a Hybrid Maritime–Terrestrial Fuel Cycle in Fluoride-Salt-Cooled High-Temperature Reactors”, Josef Hisanawi explored an innovative idea for making better use of nuclear fuel: Could fuel, first used in a compact reactor for maritime applications, be transferred to a larger land-based reactor and used further?

• Lee, Hyeji (2026). Coulomb Dissociation of 17B. Full text in Research Archive Show summary

  The neutron halo is one of the most intriguing features in systems with a large excess of neutrons compared to protons, providing valuable information about weakly bound many-body systems near the neutron drip line. 17B has long been regarded as a two-neutron halo nucleus based on various experimental observations. However, recent studies suggest otherwise due to a dominant d-wave configuration of the valance neutrons and due to the presence of a thick neutron skin. In this work, we report the first measurement of electric dipole (E1) excitation of 17B. A kinematically complete measurement was performed at RIBF, RIKEN, using the SAMURAI spectrometer. A 17B beam at 270MeV/u was impinged on a Pb target causing Coulomb dissociation (CD), and the breakup fragments 15B and two neutrons were detected in coincidence. From this measurement, the differential CD cross section and the E1 strength distribution were extracted. The observed E1 strength distribution indicates that 17B has a weakly developed halo. These results provide important structural information on 17B and they contribute to setting the criteria required for neutron halo formation.

• Lee, Hyeji (2026). Coulomb Dissociation of 17B. Full text in Research Archive Show summary

  The neutron halo is one of the most intriguing features in systems with a large excess of neutrons compared to protons, providing valuable information about weakly bound many-body systems near the neutron drip line. 17B has long been regarded as a two-neutron halo nucleus based on various experimental observations. However, recent studies suggest otherwise due to a dominant d-wave configuration of the valance neutrons and due to the presence of a thick neutron skin. In this work, we report the first measurement of electric dipole (E1) excitation of 17B. A kinematically complete measurement was performed at RIBF, RIKEN, using the SAMURAI spectrometer. A 17B beam at 270MeV/u was impinged on a Pb target causing Coulomb dissociation (CD), and the breakup fragments 15B and two neutrons were detected in coincidence. From this measurement, the differential CD cross section and the E1 strength distribution were extracted. The observed E1 strength distribution indicates that 17B has a weakly developed halo. These results provide important structural information on 17B and they contribute to setting the criteria required for neutron halo formation.

• Vines, Lasse; Frøland, Mariann Carlsen & Stokke, Anne-Marie Korseberg (2026). Coffee & Chips - Quantum technology initiatives in Norway and the center for Defects in Semiconductors for Quantum Sensing (UiO). doi: https:/www.forskningsparken.no/event/coffee-chip-may-26. Full text in Research Archive
• Siem, Sunniva & Paulsen, Wanja (2026). Nukleær kompetanse i Norge: Masterveiledning i virksomheter – en investering i framtiden. doi: https:/www.nnrc.uio.no/resultater/rapporter/pdfs/brosjyre-masterstudent-2026.pdf. Full text in Research Archive Show summary

  Veilederen er laget i samarbeid med UiO, NMBU og DSA. Virksomheter innen nukleære fagområder i Norge kan bidra med masteroppgaver og som eksterne veiledere. Heftet gir en grundig informasjon om dette.

• Siem, Sunniva (2026). Innspill fra Norsk Nukleært Forskningssenter. doi: https:/www.regjeringen.no/no/aktuelt/innspillsmoter-om-kjernekraft/id3171050/. Full text in Research Archive Show summary

  Energidepartementet inviterer til to tematiske innspillsmøter knyttet til NOU 2026:4 Kjernekraft i Norge. Begge møtene gjennomføres på Ingeniørenes Hus i Oslo (Kronprinsens gate 17). Det første innspillsmøtet omhandler kraftpolitiske sider ved kjernekraft (kraftmarked, kraftsystem, teknologi, kostnader og produksjon). Foredrag omhandler høringsinnspill fra Norsk Nukleært Forskningssenter, UiO.

• Siem, Sunniva (2026). Beredskap starter før krisen inntreffer. Hvem tar vare på fagmiljøene vi ikke har råd til å miste? doi: https:/www.nnrc.uio.no/resultater/film-podcast/2026-08-12_arendalsuke.html. Full text in Research Archive Show summary

  Fra UiOs arrangement under Arendalsuka 12. august 2026, som handler om hvordan Norge kan bevare små, spesialiserte fagmiljøer som er kritiske for samfunnets beredskap, blant annet innen nukleære fag og pandemiberedskap. Professor og senterleder Sunniva Siem snakker om hvorfor Norge trenger å opprettholde langsiktig kompetanse og sterke fagmiljøer innen nukleære fag – også før en krise oppstår. Hun deltar også i diskusjonen om hvordan kritiske, spesialiserte forskningsmiljøer kan sikres og videreutvikles over tid.

• Sahin, Eda (2026). When magic numbers stop being magic. Full text in Research Archive Show summary

  Public outreach lecture on the structure of atomic nuclei and the evolution of nuclear shell closures. The lecture introduced the concept of nuclear magic numbers and discussed how shell structure can change in exotic, neutron-rich nuclei far from stability.

• Sahin, Eda (2026). Spectroscopy of exotic nuclei. Full text in Research Archive
• Lynnebakken, Hilde & Moura, Marcel (2026). Oljesøl truet bibliotekets underjordiske magasin. Da fant forskerne fram en sopp som kan få oljen løs. - Titan.uio.no. Titan.uio.no. Full text in Research Archive
• Lee, Sang Hyun; Moura, Marcel; Srivastava, Shreya; Santelli, Cara & Kang, Peter K. (2026). There's a mushroom in the network: Filamentous fungi control multiphase flow and fluid distribution in porous media. Full text in Research Archive
• Moura, Marcel; Brodin, Joachim Falck; Reis, Paula Kozlowski Pitombeira; Pierce, Kevin; Jankov, Mihailo & Rikvold, Per Arne [Show all 11 contributors for this article] (2026). From Thin Films to Stable Fronts: Tabletop Experimental Approaches to 2D and 3D Porous Media Flows. doi: https:/www.youtube.com/live/bSQ-sHK6FTU?si=W9_rbJ5BkyRPHP0m. Full text in Research Archive
• Moura, Marcel; Bedeaux, Dick; Armstrong, Ryan T. & Kjelstrup, Signe (2026). Transient and steady-state multiphase flow experiments: fluctuation analysis, and the measurement of the Onsager coefficients. Full text in Research Archive
• Moura, Marcel; Hansen, Alex; Flekkøy, Eirik Grude & Måløy, Knut Jørgen (2026). POROUS MATTER: PoreLab's sci-art adventures in Romania. Full text in Research Archive
• Moura, Marcel; Reis, Paula Kozlowski Pitombeira; Rikvold, Per Arne; Linga, Gaute; Flekkøy, Eirik Grude & Schäfer, Gerhard [Show all 8 contributors for this article] (2026). Thin Film Flow: Fluid Transport via Thin Liquid Films in Slow Porous Media Flows. Full text in Research Archive
• Kern, Vanessa Ruth; Moura, Marcel; Olsen, Pål Eivind & Carlson, Andreas (2026). Complex Fluids in confinement: instabilities in textured lifting Hele-Shaw cells. Full text in Research Archive
• Moura, Marcel; Lanza, Federico; Kern, Vanessa Ruth; Olsen, Pål Eivind; Carlson, Andreas & Måløy, Knut Jørgen [Show all 7 contributors for this article] (2026). Instabilities in textured lifted Hele-Shaw cells and bubbly flows in a pipe. Full text in Research Archive
• Moura, Marcel (2026). Experimental methods in porous media: A little bit of our experimental activity at PoreLab (and some simulations). Full text in Research Archive
• Kern, Vanessa Ruth; Moura, Marcel; Olsen, Pål Eivind & Carlson, Andreas (2026). Instabilities and Pattern Formation in Textured Lifting Hele-Shaw Cells with Viscoplastic Fluids. Full text in Research Archive
• Oughton, Deborah Helen; Tomkiv, Yevgeniya & schneider, thierry (2026). Ethical Dimensions of Radiological Protection in Armed Conflict Situations. Full text in Research Archive Show summary

  The EU Project RRADEW (“Resilience to RADiological Events in Wartime”) has the objective to enhance nuclear emergency preparedness, response, and recovery (EPR&R) in the context of war or armed conflict disasters. As a cross-cutting issue throughout the project, RRADEW addresses ethical challenges of both radiation protection and the strategies for building resilient societies. While some aspects of radiological protection during armed conflicts are similar to those within other radiological and nuclear emergencies, new ethical challenges arise from the different actors and stakeholders (e.g., military personnel, communities under attack, aggressors), different threats and constraints on available options (. Taking a departure in the ethical values proposed by ICRP (justice, dignity, well-being and prudence), an ethical matrix was applied to explore the ethical landscape of armed conflicts situations. Key factors include challenges between roles and responsibilities of emergency responders, military and workers, and in particular duties towards families and colleagues. In addition to respecting the dignity of individuals, promoting solidarity and empathy at a community level would be of key importance. Likewise, the so-called procedural ethical values (transparency, accountability, sustainability) highlight the difficulties in assessing which principle should take precedence, and can be further aggravated in an armed conflict situation where other considerations (e.g., national security, military intelligence) are added. Finally, while it was clear that ethical reflection related to, for example, resilience, autonomy and dignity, in the context of armed conflict is of utmost importance, the greatest challenge will remain how to make these ethics work in armed conflict.

• Garrido, Pablo F. (2026). Reproducibility of quantitative methods​. Full text in Research Archive
• Hartmann, Christian Magnus & Kalantzopoulos, Georgios (2026). Presentation of NNRC Research Topic 3: nuclear simulations. Full text in Research Archive
• Gupta, Chaitanya; Skaar, Johannes; Rukan, Isak Cecil Onsager & Gulla, Jan (2026). What can cutting a photon in half tell us about causality and local equivalence? – Physics World. [Internet]. Physics World. Full text in Research Archive Show summary

  Calculations identify complicated consequences of removing a mirror

• Meir, Michaela Georgine & Larsen, Ann-Cecilie (2026). New Nature study solves a decades-old nuclear physics puzzle. doi: https:/www.linkedin.com/feed/update/urn:li:activity:7492893342847123456. Full text in Research Archive
• Garrido, Pablo F.; Walhovd, Kristine B; Krogsrud, Stine Kleppe & Fjell, Anders Martin (2026). Hippocampal volume measured from early childhood to adolescence predicts virtual navigation up to 16 years later. doi: https:/www.inavsymposium.com/wp-content/uploads/2026/07/iNAV2026_Poster_Abstracts_V2.pdf. Full text in Research Archive Show summary

  Poster presentation

• Walhovd, Kristine B; Sneve, Markus Handal; Garrido, Pablo F.; Kransberg, Jonas Moe & Fjell, Anders Martin (2026). Navigation training alters twin cortical similarity at the gray-white matter boundary. doi: https:/www.humanbrainmapping.org/aperture-neuro/. Full text in Research Archive Show summary

  Talk at OHBM 2026

• Raud, Liisa; Garrido, Pablo F.; Slivka, Maksim; Iversen, Johanne Bjørndal & Grydeland, Håkon (2026). Forskningstorget 2026 i Teknisk Museum. doi: https:/www.med.uio.no/om/aktuelt/aktuelle-saker/2026/forskningstorget-2026. Full text in Research Archive Show summary

  LCBC bod med mock-MR scanner, skin conductance og hjernemodeller

• Bergli, Joakim (2026). Kvantedatamaskiner. Full text in Research Archive Show summary

  Populærforedrag for nye fysikkstudenter

• Frøland, Mariann Carlsen; Furlan, Riccardo; Bygdås, Martin; Olsen, Vegard Standeren; Bathen, Marianne Etzelmüller & Vines, Lasse (2026). Sputtered Aluminum Nitride Thin Films as Waveguides and Hosts for Single-Photon Emitters. Full text in Research Archive Show summary

  AlN is a promising material for hosting quantum emitters and for use as optical waveguides. This work investigates the emission and structural properties of sputtered aluminium nitride thin films, with the aim of integrating these films into a quantum sensor.

• Bygdås, Martin; Zalandauskas, Vytautas; Frøland, Mariann Carlsen; Farsund, Øystein; Vines, Lasse & Bathen, Marianne Etzelmüller (2026). Intrinsic defects in AlN for single-photon emission and spin manipulation. Full text in Research Archive Show summary

  AlN is a promising host for quantum emitters, with an ultra-wide band gap, piezoelectric properties and widely used in industry. Recent reports indicate the presence of single-photon emitters (SPEs) in AlN [1,2], but the responsible defects are unidentified. This work aims to contribute towards such an identification by modelling intrinsic defects in AlN and their magneto-optical properties using density functional theory (DFT).

• Mann, Ingrid; Olsen, Sveinung viggo; Eilertsen, Yngve; Yokoyama, Yoshihiro; Tinguely, Jean-Claude & Spicher, Andres [Show all 20 contributors for this article] (2026). Maxidusty-2: The SCIENCE AND CAMPAIGN OVERVIEW. Full text in Research Archive
• Mann, Ingrid; Olsen, Sveinung viggo; Eilertsen, Yngve; Yokoyama, Yoshihiro; Tinguely, Jean-Claude & Spicher, Andres [Show all 18 contributors for this article] (2026). Dust and ionospheric constituents measured in the MLT during noctilucent cloud conditions. Full text in Research Archive
• Mann, Ingrid; Olsen, Sveinung viggo; Eilertsen, Yngve; Yokoyama, Yoshihiro; Tinguely, Jean-Claude & Spicher, Andres [Show all 18 contributors for this article] (2026). MXD2 Science and Campaign Overview. Full text in Research Archive
• Lunde, Jenny; Sandaker, Heidi & Pernegger, Heinz (2026). ATLAS Inner Tracker and Monolithic Sensors for future applications. Universitetet i Oslo. Full text in Research Archive Show summary

  Future collider experiments will require trackers that can handle high luminosity environments. The requirements for future trackers include high spatial and temporal resolution, low material budget, radiation hardness and low power consumption. The High-Luminosity LHC is expected to start during the summer of 2030, and is expected to deliver an integrated luminosity up to 4000 fb−1 over 10 years of operation. In preparation for the increased luminosity, ATLAS will replace its current tracker, the Inner Detector, with a new all-silicon tracker called the Inner Tracker (ITk). The work presented in this thesis addresses the development of detectors for high luminosity environments, including testing and production of modules for the ITk, as well as developments for a monolithic sensor with internal amplification. During the time of operation, the ITk detector can undergo large temperature variations, in case of power or cooling failures. The bump bond connections of hybrid pixel detectors need to be able to withstand the thermal stress due to differences in thermal expansion coefficients between the detector materials. To ensure the robustness of the bump bonds, a thermal cycling campaign was conducted, with an overestimation of the temperature variations and number of cycles expected for the lifetime of the ITk detector. After 100 thermal cycles, none of the modules showed a significant increase in disconnected bump bonds. The study led to the qualification of the hybridization vendors, which was needed to start full scale production of planar detector modules for ITk. To cope with high pile-up in high-luminosity environments, timing information is becoming increasingly important. The CMOS Active SenSor with Internal Amplification (CASSIA) project aims to develop a monolithic sensor with gain, to be used for time tagging or 4D tracking, where temporal resolution within a bunch crossing is added to the 3 spatial tracking dimensions. The monolithic implementation may allow for a low material budget and low power consumption, while the internal amplification gives improved timing resolution, with an aim of reaching below 100 ps timing resolution. Initial measurements and simulations of CASSIA will be presented, with a focus on gain characteristics, breakdown mechanisms and dark count rate. Different sensor design parameters, including variations in electrode and gain layer implantation, are studied to see how they affect the sensor performance. The work presents developments of pixel detectors for high luminosity collider experiments, from conceptualization and prototyping, to testing, verification and production of detector modules.

• Wells, Justin William & Ze, Adrian Lee Kai (2026). XPS Investigation of RDX: Comparison of Deposition Methods and Interpretation of Changes During Measurement. Universitetet i Oslo. Full text in Research Archive
• Holen, Gaute Arnesson; Miloch, Wojciech Jacek & Mishra, Rinku (2026). Plasma-object interaction in plasma environments: Numerical studies of spacecraft charging, probe accuracy and complex plasma. Universitetet i Oslo. Full text in Research Archive Show summary

  The majority of space is made up of a sea of plasma, with island of solid matter such as planets, moons, dust, spacecraft or even astronauts. Immersing any solid object in plasma results in electric charging of the object, as well as significant disturbances to the surrounding plasma. Understanding the plasma-object interaction is crucial for many situations, including reliable operation of scientific instrumentation on sounding rockets and satellites. This thesis has developed a complementary set of numerical codes to simulate and study the plasma-object interaction. These codes were used to simulate sounding rockets, probes and daughter-payloads in the ionosphere, as well as the lunar surface and ensembles of dust particles, allowing us to study the plasma-object interaction from different perspectives. We uncover a new trapping mechanism for ions in magnetized plasma interacting with an object using a new analytical approach and validate the daughter-payload instrumentation on the ICI-5b sounding rocket mission. Simulations of dusty plasmas show that its spatial and temporal evolution and resulting dust structure is sensitive to small charge changes. Our studies provide new insights to the complex dynamics of objects in plasma, both for specific applications and for the fundamental understanding of objects in plasma.

• Finnerud, Ole Gunnar; Adli, Erik & Lindstrøm, Carl A. (2026). Beam-breakup instability and efficiency in plasma accelerators. Universitetet i Oslo. Full text in Research Archive Show summary

  Particle colliders have been important tools in particle physics since the early 20th century. However, the growing demand for larger and higher-energy particle accelerators is driving up their cost. Plasma-based colliders have emerged as a candidate for reducing their size and cost thanks to their higher accelerating gradients. A major obstacle for this emerging technology is the efficiency—instability relation, which states that at higher efficiencies, the beam becomes more unstable, eventually breaking apart. This thesis tackles this issue through numerical simulations and experimental studies. The efficiency—instability relation is shown to be a lower bound on the strength of the instability, which varies by a large amount depending on the accelerator parameters, indicating the importance of choosing an optimal operating point. The effect of mitigation strategies is shown to be significant while also dependent on the parameters chosen. An experiment is carried out to probe the instability using novel measurement techniques. The results show indications of the instability, its correlation with efficiency, and mitigating effects. The efficiency—instability relation is complicated to measure and not fully understood in theory, but studies like the ones outlined in this thesis are important milestones towards a better understanding of it.

• Nazmul, Haque Mondon, Md; Jamilur, Rahman, Md; Morten, Hjorth-Jensen, & Fredrik, Stensson, Jan Tor (2026). Operational and Subsurface Uncertainty in Geological CO2 Storage: A Sleipner-Inspired Study. Universitetet i Oslo. Full text in Research Archive Show summary

  Geological CO2 storage projects are affected by both operational choices and subsurface uncertainty. This thesis examines how these two sources of variability influence selected storage performance and caprock integrity metrics in a Sleipner-inspired thermo-hydro-mechanical simulation ensemble. The model is based on the Sleipner 2019 Benchmark Model, but is used as a framework rather than as a history matched reconstruction of the Sleipner site. The simulation ensemble consists of 72 cases. Eight operational scenarios, defined by injection rate and the prescribed injected CO2 temperature, were simulated across nine geological realizations of the subsurface. The geological realizations vary sand porosity, sand vertical to horizontal permeability ratio, caprock Young's modulus, and caprock topography. The extracted storage metrics are bottomhole pressure, CO2 volume in the uppermost sand layer, overpressure at the top sand interface, and effective stress at the caprock interface. A linear mixed-effects model was used as the main variance decomposition tool. Injection rate, injected temperature, and their interaction were treated as fixed effects, while geological realization was represented by a random intercept. This provided an interpretable way to distinguish variability associated with controllable operational choices from realization-level geological variability under a limited simulation budget. Supplementary surrogate diagnostics were used to check whether some responses contained nonlinear structure not captured by the mixed-effects model. The results show a clear difference between the storage metrics. Bottomhole pressure, CO2 volume in the uppermost sand layer, and overpressure at the top sand interface are mainly associated with the operational scenario. The minimum and 1st percentile effective stress at the caprock interface are instead mainly associated with the geological realization. Spatial analysis indicates that the lowest effective stress values occur repeatedly in a shallow region of the caprock interface, where geological variability in total stress and pore pressure is larger than the operational variability. The study demonstrates that a crossed simulation ensemble combined with a simple mixed-effects model can provide useful separation between operational and realization-level controls for selected CO2 storage metrics. The results also show that this separation depends on the metric used, and that nonlinear mobility effects should be considered when interpreting BHP and CO2 plume responses.

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