Ann-Cecilie Larsen

Academic Interests
What happens if the atomic nucleus is heated to several billion degrees?
How were the elements that we know of in the Universe made?
How can nuclear physics save lives?
The nuclear physics group at the Oslo Cyclotron Laboratory (OCL) has developed a method to measure the properties of atomic nuclei at very high temperatures. At these temperatures, the most important properties are the level density, which is how many quantum states available for the nucleus at a given excitation energy, and the gamma-ray strength function, which is a measure of the probability of electromagnetic decay for a certain gamma energy. These two quantities are indispensable for estimating astrophysical reaction rates, which in turn are used for modeling the creation of the various elements in, e.g., supernovae.
New results from the OCL experiments show that some nuclei have an enhanced probability for electromagnetic decay for low-energetic gamma rays. It turns out that these discoveries might have a huge impact on the astrophysical reaction rates of the so-called r-process (rapid neutron capture), which is believed to be the mechanism behind about 50% of the heavy elements we observe in the Universe. Dependent on the models applied in the calculations, the reaction rates can increase up to a factor of 300 for the most neutron-rich nuclei [A. C. Larsen and S. Goriely, Physical Review C 82, 014318 (2010)].
Atomic nuclei may also be used for efficient and precise cancer treatment. By shooting e.g. protons (ionized hydrogen gas) or carbon ions into a tumor, the cancer cells will die while the surrounding healthy tissue will receive a minimal dose compared to conventional radiation treatment. Proton and ion therapy is now a well established method of treatment in many countries, and hopefully this method will also be available for Norwegian cancer patients soon.
Teaching
From spring 2021: FYS-MEK1110 - Mechanics https://www.uio.no/studier/emner/matnat/fys/FYS-MEK1110/index-eng.html
Lecturer, FYS4515 - Nuclear Physics I https://www.uio.no/studier/emner/matnat/fys/FYS4515/index-eng.html
Previous teaching
- colloquium teacher, FYS-MEK1110 - Mechanics http://www.uio.no/studier/emner/matnat/fys/FYS-MEK1110/index-eng.html
- lab teacher, KJM-FYS5920 - Nuclear measurement techniques and instruments http://www.uio.no/studier/emner/matnat/kjemi/KJM-FYS5920/index-eng.html
Higher education and employment history
Cand.mag. in Physics, Dec. 2002, Department of Physics, University of Oslo
Cand.scient. in Nuclear Physics, June 2004, Department of Physics, University of Oslo
Ph.D. in Nuclear Physics, May 2008, Department of Physics, University of Oslo
Research fellow, OCL nuclear physics group, June 2008 - Feb 2009, Department of Physics, University of Oslo
Post.doc., OCL nuclear physics group, Nov. 2009 - Feb 2011, Department of Physics, University of Oslo
Personal postdoc grant, Research Council of Norway, Nov 2011 - Oct 2014, Department of Physics, University of Oslo
Guest researcher, Université Libre de Bruxelles, spring 2013
Guest researcher, UC Berkeley/Lawrence Berkeley National Lab/Lawrence Livermore National Lab, fall 2013
Guest researcher, National Superconducting Cyclotron Laboratory/Michigan State University, summer 2014
Fulbright fellow at the National Superconducting Cyclotron Laboratory/Michigan State University, fall 2016
Fulbright fellow at UC Berkeley/Lawrence Berkeley National Lab, spring 2017
Honoraria
Fulbright Scholarship, 2016-2017
Member of the Norwegian Academy for Science and Letters, 2017-
Prize for Young, Excellent Researchers, Research Council of Norway, fall 2016
Starting Grant (STG-ERC-2014), European Research Council, Grant Agreement No. 637686, 2015-2020
Personal postdoc grant from the Research Council of Norway, Project Grant No. 205528, 2011-2014
Best poster presentation award, Zakopane Conference on Nuclear Physics, 2006
Cooperation
Oslo Syklotronlaboratorium (OCL), http://ocl.uio.no
Université Libre de Bruxelles, http://www.ulb.ac.be/index.html
National Superconducting Cyclotron Laboratory, Michigan State University, http://www.nscl.msu.edu
Lawrence Berkeley National Laboratory, http://www.lbl.gov
Institute of Nuclear Physics NCSR Demokritos, http://www.inp.demokritos.gr/
Lawrence Livermore National Laboratory, https://www.llnl.gov/
Publications
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Naqvi, F.; Crespo Campo, Lucia; Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Renstrøm, Therese & Siem, Sunniva [Show all 7 contributors for this article] (2022). Total absorption spectroscopy measurement on neutron-rich 74,75Cu isotopes. Nuclear Physics A. ISSN 0375-9474. A1018(122359). doi: 10.1016/j.nuclphysa.2021.122359.
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Gjestvang, Dorthea; Siem, Sunniva; Zeiser, Fabio; Randrup, Jørgen; Vogt, Ramona & Bello Garrote, Frank Leonel [Show all 20 contributors for this article] (2021). The study of prompt fission γ rays at the Oslo Cyclotron Laboratory. The European Physical Journal Conferences. ISSN 2101-6275. doi: 10.1051/epjconf/202125600005. Full text in Research Archive
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Markova, Maria; von Neumann-Cosel, Neumann-Cosel; Larsen, A.C.; Bassauer, S.; Görgen, A. & Guttormsen, Magne Sveen [Show all 25 contributors for this article] (2021). Comprehensive Test of the Brink-Axel Hypothesis in the Energy Region of the Pygmy Dipole Resonance. Physical Review Letters. ISSN 0031-9007. 127(18). doi: 10.1103/PhysRevLett.127.182501. Full text in Research Archive
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Wiedeking, Mathis; Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Zeiser, Fabio; Görgen, Andreas & Liddick, Sean N. [Show all 9 contributors for this article] (2021). Independent normalization for gamma-ray strength functions: The shape method. Physical Review C. ISSN 2469-9985. 104(014311). doi: 10.1103/PhysRevC.104.014311. Full text in Research Archive
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Persch, C.F.; DeYoung, P.A.; Lyons, S.; Spyrou, Artemis; Liddick, Sean N. & Naqvi, F. [Show all 27 contributors for this article] (2021). Beta-decay feeding intensity distributions of 71,73Ni. Physical Review C. ISSN 2469-9985. C103(055808). doi: 10.1103/PhysRevC.103.055808. Full text in Research Archive
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Görgen, Andreas; Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Siem, Sunniva; Adli, Erik & Edin, Nina Frederike J [Show all 14 contributors for this article] (2021). The Oslo Cyclotron Laboratory. The European Physical Journal Plus. ISSN 2190-5444. 136, p. 1–13. doi: 10.1140/epjp/s13360-021-01150-3. Full text in Research Archive
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Guttormsen, Magne Sveen; Alhassid, Yoram; Ryssens, Wouter; Ay, K.o.; Ozgur, Mustafa & Algin, Emel [Show all 22 contributors for this article] (2021). Strong enhancement of level densities in the crossover from spherical to deformed neodymium isotopes. Physics Letters B. ISSN 0370-2693. 816. doi: 10.1016/j.physletb.2021.136206. Full text in Research Archive
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Gjestvang, Dorthea; Siem, Sunniva; Zeiser, Fabio; Randrup, Jørgen; Vogt, Ramona & Wilson, Jonathan Nicholas [Show all 19 contributors for this article] (2021). Excitation energy dependence of prompt fission γ-ray emission from 241Pu*. Physical Review C. ISSN 2469-9985. 103(3). doi: 10.1103/PhysRevC.103.034609. Full text in Research Archive Show summary
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Malatji, Kgashane Leroy; Beckmann, Kristine Sønstevold; Wiedeking, Mathis; Siem, Sunniva; Goriely, Stephane & Larsen, Ann-Cecilie [Show all 21 contributors for this article] (2021). Statistical properties of the well deformed 153,155Sm nuclei and the scissors resonance. Physical Review C. ISSN 2469-9985. 103(1). doi: 10.1103/PhysRevC.103.014309. Full text in Research Archive
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Midtbø, Jørgen E.; Zeiser, Fabio; Lima, Erlend; Larsen, Ann-Cecilie; Tveten, Gry Merete & Guttormsen, Magne Sveen [Show all 9 contributors for this article] (2021). A new software implementation of the Oslo method with rigorous statistical uncertainty propagation. Computer Physics Communications. ISSN 0010-4655. 262. doi: 10.1016/j.cpc.2020.107795. Full text in Research Archive
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Zeiser, Fabio; Tveten, Gry Merete; Bello Garrote, Frank Leonel; Guttormsen, Magne Sveen; Larsen, Ann-Cecilie & Ingeberg, Vetle Wegner [Show all 8 contributors for this article] (2021). The gamma-ray energy response of the Oslo Scintillator Array OSCAR. Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment. ISSN 0168-9002. 985. doi: 10.1016/j.nima.2020.164678. Full text in Research Archive
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Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Spyrou, Artemis & Liddick, Sean N. (2020). Experimentally constrained (n, γ) reaction rates relevant to r- and i-process nucleosynthesis. Acta Physica Polonica B. ISSN 0587-4254. 56(3), p. 667–676. doi: 10.5506/APhysPolB.51.667. Full text in Research Archive
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Scholz, P.; Guttormsen, Magne Sveen; Heim, F.; Larsen, Ann-Cecilie; Mayer, J. & Savran, D. [Show all 12 contributors for this article] (2020). Primary γ-ray intensities and γ-strength functions from discrete two-step γ-ray cascades in radiative proton-capture experiments. Physical Review C. ISSN 2469-9985. doi: 10.1103/PhysRevC.101.045806. Full text in Research Archive
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Kibédi, T.; Alshahrani, B.; Stuchbery, A.E.; Larsen, Ann-Cecilie; Görgen, Andreas & Siem, Sunniva [Show all 20 contributors for this article] (2020). Radiative Width of the Hoyle State from γ -Ray Spectroscopy. Physical Review Letters. ISSN 0031-9007. 125(18). doi: 10.1103/PhysRevLett.125.182701. Full text in Research Archive
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Ingeberg, Vetle Wegner; Siem, Sunniva; Wiedeking, Mathis; Sieja, Kamila; Bleuel, D.l. & Brits, C.P. [Show all 29 contributors for this article] (2020). First application of the Oslo method in inverse kinematics. European Physical Journal A. ISSN 1434-6001. 56. doi: 10.1140/epja/s10050-020-00070-7. Full text in Research Archive Show summary
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Wrzosek-Lipska, K.; Rezynkina, K.; Bree, N.; Zielińska, M.; Gaffney, L.P. & Petts, A. [Show all 70 contributors for this article] (2019). Electromagnetic properties of low-lying states in neutron-deficient Hg isotopes: Coulomb excitation of <sup>182</sup>Hg, <sup>184</sup>Hg, <sup>186</sup>Hg and <sup>188</sup>Hg. European Physical Journal A. ISSN 1434-6001. 55(8), p. 1–23. doi: 10.1140/epja/i2019-12815-2.
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Krzysiek, Mateusz; Utsunomiya, Hiroaki; Gheorghe, Ioana; Filipescu, Dan Mihai; Renstrøm, Therese & Tveten, Gry Merete [Show all 19 contributors for this article] (2019). Photoneutron cross-section measurements for 165HO by the direct neutron-multiplicity sorting at Newsubaru . Acta Physica Polonica B. ISSN 0587-4254. 50(3), p. 487–494. doi: 10.5506/APhysPolB.50.487.
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Midtbø, Jørgen E.; Larsen, Ann-Cecilie; Renstrøm, Therese; Bello Garrote, Frank Leonel & Lima, Erlend (2019). Systematic Low-Energy Enhancementof the Gamma-Ray Strength Function. In Formicola, Alba; Junker, Matthias; Gialanella, Lucio & Imbriani, Gianluca (Ed.), Nuclei in the Cosmos XV. Springer. ISSN 978-3-030-13875-2. p. 405–407. doi: 10.1007/978-3-030-13876-9.
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Larsen, Ann-Cecilie; Liddick, Sean N.; Spyrou, Artemis; Guttormsen, Magne Sveen; Bello Garrote, Frank Leonel & Midtbø, Jørgen E. [Show all 7 contributors for this article] (2019). The Beta-Oslo Method: ExperimentallyConstrained (n,γ) Reaction RatesRelevant to ther-Process. In Formicola, Alba; Junker, Matthias; Gialanella, Lucio & Imbriani, Gianluca (Ed.), Nuclei in the Cosmos XV. Springer. ISSN 978-3-030-13875-2. p. 137–140. doi: 10.1007/978-3-030-13876-9_22.
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Guttormsen, Magne Sveen; Goriely, Stephane; Larsen, Ann-Cecilie; Görgen, Andreas; Hagen, Trine Wiborg & Renstrøm, Therese [Show all 13 contributors for this article] (2019). Indirect(n,γ)91,92Zr Cross SectionMeasurements for the s-Process. In Formicola, Alba; Junker, Matthias; Gialanella, Lucio & Imbriani, Gianluca (Ed.), Nuclei in the Cosmos XV. Springer. ISSN 978-3-030-13875-2. p. 359–362. doi: 10.1007/978-3-030-13876-9_65.
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Voinov, Alexander; Renstrøm, Therese; Bleuel, D.l.; Grimes, S.M.; Guttormsen, Magne Sveen & Larsen, Ann-Cecilie [Show all 23 contributors for this article] (2019). Level densities of 74,76Ge from compound nuclear reactions. Physical Review C. ISSN 2469-9985. 99(5). doi: 10.1103/PhysRevC.99.054609. Full text in Research Archive
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Brits, C.P.; Malatji, Kgashane L.; Wiedeking, M.; Kheswa, BV; Goriely, S. & Bello Garrote, Frank Leonel [Show all 27 contributors for this article] (2019). Nuclear level densities and γ-ray strength functions of 180,181,182Ta. Physical Review C. ISSN 2469-9985. 99(5). doi: 10.1103/PhysRevC.99.054330. Full text in Research Archive
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Zeiser, Fabio; Tveten, Gry Merete; Potel, Gregory; Larsen, Ann-Cecilie; Guttormsen, Magne Sveen & Laplace, Thibault A. [Show all 22 contributors for this article] (2019). Restricted spin-range correction in the Oslo method: The example of nuclear level density and γ-ray strength function from 239Pu(d, pγ) 240Pu. Physical Review C. ISSN 2469-9985. 100:024305(2), p. 1–9. doi: 10.1103/PhysRevC.100.024305. Full text in Research Archive
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Lyons, Stephanie; Spyrou, Artemis; Liddick, Sean N.; Naqvi, Farheen; Crider, Benjamin P. & Dombos, Alexander C. [Show all 25 contributors for this article] (2019). 69,71Co β-decay strength distributions from total absorption spectroscopy. Physical Review C. ISSN 2469-9985. 100(2), p. 1–10. doi: 10.1103/PhysRevC.100.025806. Full text in Research Archive
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Liddick, Sean N.; Larsen, Ann-Cecilie; Guttormsen, Magne Sveen; Spyrou, Artemis; Crider, Benjamin P. & Naqvi, Farheen [Show all 30 contributors for this article] (2019). Benchmarking the extraction of statistical neutron capture cross sections on short-lived nuclei for applications using the β-Oslo method . Physical Review C. ISSN 2469-9985. 100:024624(2), p. 1–12. doi: 10.1103/PhysRevC.100.024624. Full text in Research Archive
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Larsen, Ann-Cecilie; Spyrou, Artemis; Liddick, Sean N. & Guttormsen, Magne Sveen (2019). Novel techniques for constraining neutron-capture rates relevant for r-process heavy-element nucleosynthesis. Progress in Particle and Nuclear Physics. ISSN 0146-6410. 107, p. 69–108. doi: 10.1016/j.ppnp.2019.04.002. Full text in Research Archive
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Kullmann, Ina Kristine Berentsen; Larsen, Ann-Cecilie; Renstrøm, Therese; Beckmann, Kristine Sønstevold; Bello Garrote, Frank Leonel & Crespo Campo, Lucia [Show all 13 contributors for this article] (2019). First experimental constraint on the 191Os(n,γ) reaction rate relevant to s-process nucleosynthesis . Physical Review C. ISSN 2469-9985. 99(6). doi: 10.1103/PhysRevC.99.065806. Full text in Research Archive Show summary
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Utsunomiya, Hiroaki; Renstrøm, Therese; Tveten, Gry Merete; Goriely, Stéphane; Ari-izumi, Takashi & Filipescu, Dan Mihai [Show all 14 contributors for this article] (2019). γ-ray strength function for thallium isotopes relevant to the 205Pb−205Tl chronometry. Physical Review C. ISSN 2469-9985. 99(2), p. 024609-1–023609-8. doi: 10.1103/PhysRevC.99.024609. Full text in Research Archive
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Malatji, Kgashane Leroy; Wiedeking, Mathis; Goriely, Stephane; Brits, Christiaan Petrus; Kheswa, Bonginkosi Vincent & Bello Garrote, Frank Leonel [Show all 22 contributors for this article] (2019). Re-estimation of 180Ta nucleosynthesis in light of newly constrained reaction rates. Physics Letters B. ISSN 0370-2693. 791, p. 403–408. doi: 10.1016/j.physletb.2019.03.013. Full text in Research Archive
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Lewis, Rebecca; Liddick, Sean N.; Larsen, Ann-Cecilie; Spyrou, Artemis; Bleuel, Darren L. & Couture, Aaron J. [Show all 17 contributors for this article] (2019). Experimental constraints on the 73Zn(n,γ)74Zn reaction rate. Physical Review C. ISSN 2469-9985. 99(3). doi: 10.1103/PhysRevC.99.034601. Full text in Research Archive
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Midtbø, Jørgen E.; Larsen, Ann-Cecilie; Renstrøm, Therese; Bello Garrote, Frank Leonel & Lima, Erlend (2018). Consolidating the concept of low-energy magnetic dipole decay radiation. Physical Review C. ISSN 2469-9985. 98(6), p. 064321-1–064321-12. doi: 10.1103/PhysRevC.98.064321. Full text in Research Archive
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Larsen, Ann-Cecilie; Midtbø, Jørgen E.; Guttormsen, Magne Sveen; Renstrøm, Therese; Liddick, Sean N. & Spyrou, Artemis [Show all 22 contributors for this article] (2018). Enhanced low-energy γ-decay strength of 70Ni and its robustness within the shell model. Physical Review C. ISSN 2469-9985. 97(5), p. 1–9. doi: 10.1103/PhysRevC.97.054329. Full text in Research Archive
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Jones, M.D.; Macchiavelli, Augusto Oswaldo; Wiedeking, Mathis; Bernstein, Lee A.; Crawford, Heather L. & Campbell, C.M. [Show all 30 contributors for this article] (2018). Examination of the Low-Energy Enhancement of the gamma-ray Strength Function of 56Fe. Physical Review C. ISSN 2469-9985. 97(2). doi: 10.1103/PhysRevC.97.024327. Full text in Research Archive
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Crespo Campo, Lucia; Guttormsen, Magne Sveen; Bello Garrote, Frank Leonel; Eriksen, Tomas Kvalheim; Giacoppo, Francesca & Görgen, Andreas [Show all 15 contributors for this article] (2018). Test of the generalized Brink-Axel hypothesis in 64,65Ni. Physical Review C. ISSN 2469-9985. 98, p. 054303-1–054303-10. doi: 10.1103/PhysRevC.98.054303. Full text in Research Archive Show summary
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Renstrøm, Therese; Utsunomiya, H.; Nyhus, Hilde-Therese; Larsen, Ann-Cecilie; Guttormsen, Magne Sveen & Tveten, Gry Merete [Show all 16 contributors for this article] (2018). Verification of detailed balance for γ absorption and emission in Dy isotopes. Physical Review C. ISSN 2469-9985. 98(5), p. 1–14. doi: 10.1103/PhysRevC.98.054310. Full text in Research Archive Show summary
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Utsunomiya, Hiroaki; Renstrøm, Therese; Tveten, Gry Merete; Goriely, Stéphane; Katayama, Seitaro & Ari-Izumi, Takashi [Show all 22 contributors for this article] (2018). Photoneutron cross sections for Ni isotopes: Toward understanding (n, γ ) cross sections relevant to weak s-process nucleosynthesis. Physical Review C. ISSN 2469-9985. 98(5), p. 1–9. doi: 10.1103/PhysRevC.98.054619. Full text in Research Archive Show summary
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Utsunomiya, Hiroaki; Renstrøm, Therese; Tveten, Gry Merete; Gheorghe, Ioana; Filipescu, Dan Mihai & Belyshev, Sergey [Show all 22 contributors for this article] (2018). Photoneutron Reaction Data for Nuclear Physics and Astrophysics. The European Physical Journal Conferences. ISSN 2101-6275. 178. doi: 10.1051/epjconf/201817806003. Full text in Research Archive
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Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Midtbø, Jørgen E.; Crespo Campo, Lucia; Görgen, Andreas & Ingeberg, Vetle Wegner [Show all 11 contributors for this article] (2018). Gamma-widths, lifetimes and fluctuations in the nuclear quasi-continuum. The European Physical Journal Conferences. ISSN 2101-6275. 178(06001). doi: 10.1051/epjconf/201817806001. Full text in Research Archive
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Wiedeking, Mathis; Bernstein, Lee A.; Bleuel, Darren L.; Brits, Christiaan Petrus; Sowazi, Khanyisa & Görgen, Andreas [Show all 16 contributors for this article] (2017). Statistical gamma-ray decay studies at iThemba LABS. The European Physical Journal Conferences. ISSN 2101-6275. 146:05006, p. 1–4. doi: 10.1051/epjconf/201714605006.
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Brits, C.P.; Wiedeking, M.; Bello Garrote, Frank Leonel; Bleuel, D. L.; Giacoppo, F. & Görgen, Andreas [Show all 22 contributors for this article] (2017). Resonances in odd-odd 182Ta. The European Physical Journal Conferences. ISSN 2101-6275. 146. doi: 10.1051/epjconf/201714605012. Full text in Research Archive
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Malatji, Kgashane L.; Kheswa, Bonginkosi Vincent; Wiedeking, M.; Bello Garrote, Frank Leonel; Brits, C.P. & Bleuel, D. L. [Show all 21 contributors for this article] (2017). Nuclear level densities and γ-ray strength functions of 180,181Ta and neutron capture cross sections. The European Physical Journal Conferences. ISSN 2101-6275. 146. doi: 10.1051/epjconf/201714601010. Full text in Research Archive
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Larsen, Ann-Cecilie; Spyrou, Artemis; Liddick, Sean N.; Guttormsen, Magne Sveen; Ingeberg, Vetle Wegner & Siem, Sunniva [Show all 25 contributors for this article] (2017). Novel Techniques for Constraining Neutron-capture Rates relevant to Heavy-element Nucleosynthesis. Proceedings of Science (PoS). ISSN 1824-8039. INPC2016. doi: 10.22323/1.281.0360. Full text in Research Archive
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Tveten, Gry Merete; Spyrou, Artemis; Schwengner, Ronald; Naqvi, Farheen; Larsen, Ann-Cecilie & Renstrøm, Therese [Show all 23 contributors for this article] (2017). The Statistical Properties Of 92Mo And Implications For The p-process. Proceedings of Science (PoS). ISSN 1824-8039. INPC2016. Full text in Research Archive Show summary
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Crespo Campo, Lucia; Larsen, Ann-Cecilie; Bello Garrote, Frank Leonel; Eriksen, Tomas Kvalheim; Giacoppo, Francesca & Görgen, Andreas [Show all 13 contributors for this article] (2017). Investigating the gamma decay of Ni 65 from particle-gamma coincidence data. Physical Review C. ISSN 2469-9985. 96(1). doi: 10.1103/PhysRevC.96.014312. Full text in Research Archive
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Rose, Sunniva Johanne; Zeiser, Fabio; Wilson, JN; Oberstedt, A; Oberstedt, S & Siem, Sunniva [Show all 25 contributors for this article] (2017). Energy dependence of the prompt gamma-ray emission from the (d,p)-induced fission of U-234 and Pu-240. Physical Review C. ISSN 2469-9985. 96(1). doi: 10.1103/PhysRevC.96.014601. Full text in Research Archive
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Guttormsen, Magne Sveen; Goriely, Stephan; Larsen, Ann-Cecilie; Görgen, Andreas; Hagen, Trine Wiborg & Renstrøm, Therese [Show all 13 contributors for this article] (2017). Quasicontinuum γ decay of 91,92Zr: Benchmarking indirect (n,γ ) cross section measurements for the s process. Physical Review C. ISSN 2469-9985. 96(2). doi: 10.1103/PhysRevC.96.024313. Full text in Research Archive
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Spyrou, Artemis; Larsen, Ann-Cecilie; Liddick, Sean N.; Naqvi, Farheen; Crider, Benjamin P. & Dombos, Alexander C. [Show all 19 contributors for this article] (2017). Neutron-capture rates for explosive nucleosynthesis: the case of 68Ni(n, γ)69Ni. Journal of Physics G: Nuclear and Particle Physics. ISSN 0954-3899. 44. doi: 10.1088/1361-6471/aa5ae7. Full text in Research Archive
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Kheswa, Bonginkosi Vincent; Wiedeking, Mathis; Brown, Joshua A.; Larsen, Ann-Cecilie; Goriely, Stéphane & Guttormsen, Magne Sveen [Show all 25 contributors for this article] (2017). 137,138,139La(n,γ) cross sections constrained with statistical decay properties of 138,139,140La nuclei. Physical Review C. ISSN 2469-9985. 95(4). doi: 10.1103/PhysRevC.95.045805. Full text in Research Archive
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Larsen, Ann-Cecilie; Guttormsen, Magne Sveen; Blasi, Nives; Bracco, Angela; Camera, Franco & Crespo Campo, Lucia [Show all 24 contributors for this article] (2017). Low-energy enhancement and fluctuations of γ-ray strength functions in 56,57Fe: test of the Brink–Axel hypothesis. Journal of Physics G: Nuclear and Particle Physics. ISSN 0954-3899. 44(6). doi: 10.1088/1361-6471/aa644a. Full text in Research Archive
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Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Görgen, Andreas; Renstrøm, Therese; Siem, Sunniva & Tornyi, Tamas Gabor [Show all 7 contributors for this article] (2016). Is the generalized Brink-Axel hypothesis valid? Proceedings of Science (PoS). ISSN 1824-8039. 2016-September, p. 1–8. doi: 10.22323/1.281.0062. Full text in Research Archive
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Larsen, Ann-Cecilie; Spyrou, Artemisia; Liddick, Sean N.; Guttormsen, Magne Sveen; Ingeberg, Vetle Wegner & Siem, Sunniva [Show all 25 contributors for this article] (2016). Novel techniques for constraining neutron-capture rates relevant to heavy-element nucleosynthesis. Proceedings of Science (PoS). ISSN 1824-8039. 2016-September:360, p. 1–9. Full text in Research Archive
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Tveten, Gry Merete; Spyrou, Artemis; Schwengner, Ronald; Naqvi, Farheen; Larsen, Ann-Cecilie & Renstrøm, Therese [Show all 23 contributors for this article] (2016). The statistical properties of 92Mo and implications for the p-process. Proceedings of Science (PoS). ISSN 1824-8039. 2016-September:163.
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Clement, E; Zielinska, Magdalena; Péru, Sophie; Goutte, Héloïse; Hilaire, Stephane & Görgen, Andreas [Show all 51 contributors for this article] (2016). Low-energy Coulomb excitation of 96,98Sr beams. Physical Review C. Nuclear Physics. ISSN 0556-2813. 94(5). doi: 10.1103/PhysRevC.94.054326. Full text in Research Archive
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Crespo Campo, Lucia; Bello Garrote, Frank Leonel; Eriksen, Tomas Kvalheim; Görgen, Andreas; Guttormsen, Magne Sveen & Hadynska-Klek, Katarzyna [Show all 14 contributors for this article] (2016). Statistical γ -decay properties of Ni 64 and deduced (n,γ) cross section of the s -process branch-point nucleus Ni 63. Physical Review C. Nuclear Physics. ISSN 0556-2813. 94(4). doi: 10.1103/PhysRevC.94.044321. Full text in Research Archive
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Ay, K.o.; Ozgur, Mustafa; Algin, Emel; Guttormsen, Magne Sveen; Bello Garrote, Frank Leonel & Crespo Campo, Lucia [Show all 20 contributors for this article] (2016). Nuclear level densities and gamma-ray strength functions of 145,149,151Nd isotopes. Journal of Physics: Conference Series (JPCS). ISSN 1742-6588. 766(012027). doi: 10.1088/1742-6596/766/1/012027.
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Negi, D; Wiedeking, M; Lanza, EG; Litvinova, E; Vitturi, A & Bark, RA [Show all 35 contributors for this article] (2016). Nature of low-lying electric dipole resonance excitations in Ge 74. Physical Review C. Nuclear Physics. ISSN 0556-2813. 94(2). doi: 10.1103/PhysRevC.94.024332. Full text in Research Archive
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Ducasse, Q; Jurado, B; Aiche, M; Marini, P; Mathieu, L & Görgen, Andreas [Show all 29 contributors for this article] (2016). Investigation of the U 238 (d,p) surrogate reaction via the simultaneous measurement of γ -decay and fission probabilities. Physical Review C. Nuclear Physics. ISSN 0556-2813. 94(2). doi: 10.1103/PhysRevC.94.024614. Full text in Research Archive
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Tveten, Gry Merete; Spyrou, A; Schwengner, R; Naqvi, F; Larsen, Ann-Cecilie & Eriksen, Tomas Kvalheim [Show all 23 contributors for this article] (2016). Completing the nuclear reaction puzzle of the nucleosynthesis of Mo 92. Physical Review C. Nuclear Physics. ISSN 0556-2813. 94(2). doi: 10.1103/PhysRevC.94.025804. Full text in Research Archive
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Marini, P.; Ducasse, Q; Jurado, B; Aiche, M; Mathieu, L & Barreau, G. [Show all 33 contributors for this article] (2016). First simultaneous measurement of fission and gamma probabilities of <sup>237</sup>U and <sup>239</sup>Np via surrogate reactions. The European Physical Journal Conferences. ISSN 2101-6275. 122. doi: 10.1051/epjconf/201612212004.
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Spyrou, Artemis; Liddick, Sean N.; Naqvi, Farheen; Crider, Benjamin P.; Dombos, Alexander C. & Bleuel, Darren L. [Show all 21 contributors for this article] (2016). Strong Neutron-γ Competition above the Neutron Threshold in the Decay of 70Co. Physical Review Letters. ISSN 0031-9007. 117(14). doi: 10.1103/PhysRevLett.117.142701. Full text in Research Archive
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Liddick, Sean N.; Spyrou, Artemisia; Crider, Benjamin P.; Naqvi, Farheen; Larsen, Ann-Cecilie & Guttormsen, Magne Sveen [Show all 21 contributors for this article] (2016). Experimental Neutron Capture Rate Constraint Far from Stability. Physical Review Letters. ISSN 0031-9007. 116:242502(24). doi: 10.1103/PhysRevLett.116.242502. Full text in Research Archive
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Renstrøm, Therese; Nyhus, Hilde-Therese; Utsunomiya, Hiroaki; Schwengner, Ronald; Goriely, Stephane & Larsen, Ann-Cecilie [Show all 25 contributors for this article] (2016). Low-energy enhancement in the γ-ray strength functions of Ge73,74. Physical Review C. Nuclear Physics. ISSN 0556-2813. 93(6). doi: 10.1103/PhysRevC.93.064302. Full text in Research Archive
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Wiedeking, Mathis; Krtička, M.; Bernstein, L. A.; Allmond, J. M.; Basunia, M. S. & Bleuel, Darren L. [Show all 21 contributors for this article] (2016). γ-ray decay from neutron-bound and unbound states in Mo 95 and a novel technique for spin determination. Physical Review C. Nuclear Physics. ISSN 0556-2813. 93(2). doi: 10.1103/PhysRevC.93.024303. Full text in Research Archive
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Larsen, Ann-Cecilie; Guttormsen, Magne Sveen; Schwengner, Ronald; Bleuel, Darren L.; Goriely, Stephane & Harrisopulos, Sotirios [Show all 21 contributors for this article] (2016). Experimentally constrained (p,γ) y 89 and (n,γ) y 89 reaction rates relevant to p -process nucleosynthesis. Physical Review C. Nuclear Physics. ISSN 0556-2813. 93(4). doi: 10.1103/PhysRevC.93.045810. Full text in Research Archive
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Klintefjord, Malin; Hadynska-Klek, Katarzyna; Görgen, Andreas; Bauer, C; Bello Garrote, Frank Leonel & Bönig, S [Show all 44 contributors for this article] (2016). Structure of low-lying states in Sm140 studied by Coulomb excitation. Physical Review C. Nuclear Physics. ISSN 0556-2813. 93(5). doi: 10.1103/PhysRevC.93.054303.
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Simon, Anna; Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Beausang, Con W.; Humby, Peter & Burke, Jason T. [Show all 17 contributors for this article] (2016). First observation of low-energy γ -ray enhancement in the rare-earth region. Physical Review C. Nuclear Physics. ISSN 0556-2813. 93:034303. doi: 10.1103/PhysRevC.93.034303. Full text in Research Archive
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Laplace, Thibault A.; Zeiser, Fabio; Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Bleuel, Darren L. & Bernstein, Lee A. [Show all 27 contributors for this article] (2016). Statistical properties of Pu 243, and Pu 242 (n,γ) cross section calculation. Physical Review C. Nuclear Physics. ISSN 0556-2813. 93(1). doi: 10.1103/PhysRevC.93.014323. Full text in Research Archive
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Clément, Emmanuel; Zielińska, Magdalena; Görgen, Andreas; Körten, Wolfram; Péru, Sophie & Libert, Jacques J. [Show all 51 contributors for this article] (2016). Spectroscopic Quadrupole Moments in Sr 96,98: Evidence for Shape Coexistence in Neutron-Rich Strontium Isotopes at N=60. Physical Review Letters. ISSN 0031-9007. 116:022701(2). doi: 10.1103/PhysRevLett.116.022701. Full text in Research Archive
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Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Görgen, Andreas; Renstrøm, Therese; Siem, Sunniva & Tornyi, Tamas Gabor [Show all 7 contributors for this article] (2016). Validity of the Generalized Brink-Axel Hypothesis in Np 238. Physical Review Letters. ISSN 0031-9007. 116(1). doi: 10.1103/PhysRevLett.116.012502. Full text in Research Archive
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Moretto, Luciano; Larsen, Ann-Cecilie; Guttormsen, Magne Sveen & Siem, Sunniva (2015). The little hagedorn that could. Proceedings of Science (PoS). ISSN 1824-8039. 26-30-January-2015:058. Full text in Research Archive
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Schwengner, Ronald; Frauendorf, Stefan & Larsen, Ann-Cecilie (2015). Low-energy enhancement of M1 strength. Journal of Physics: Conference Series (JPCS). ISSN 1742-6588. 580:012020, p. 1–7. doi: 10.1088/1742-6596/580/1/012020. Full text in Research Archive
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Renstrøm, Therese; Nyhus, Hilde-Therese; Utsunomiya, Hiroaki; Larsen, Ann-Cecilie; Siem, Sunniva & Guttormsen, Magne Sveen [Show all 25 contributors for this article] (2015). First evidence of low energy enhancement in Ge isotopes. The European Physical Journal Conferences. ISSN 2101-6275. 93. doi: 10.1051/epjconf/20159304003. Full text in Research Archive
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Kheswa, Bonginkosi Vincent; Wiedeking, Mathis; Giacoppo, Francesca; Goriely, Stephane; Guttormsen, Magne Sveen & Larsen, Ann-Cecilie [Show all 19 contributors for this article] (2015). Statistical nuclear properties and synthesis of La-138. The European Physical Journal Conferences. ISSN 2101-6275. 93. doi: 10.1051/epjconf/20159304005.
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Giacoppo, Francesca; Bello Garrote, Frank Leonel; Eriksen, Tomas Kvalheim; Görgen, Andreas; Guttormsen, Magne Sveen & Hagen, Trine Wiborg [Show all 16 contributors for this article] (2015). Observation of low-lying resonances in the quasicontinuum of Pt-195,Pt-196 and enhanced astrophysical reaction rates. The European Physical Journal Conferences. ISSN 2101-6275. 93. doi: 10.1051/epjconf/20159301039.
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Guttormsen, Magne Sveen; Aiche, M; Bello Garrote, Frank Leonel; Bernstein, Lee; Bleuel, D.l. & Byun, Y. [Show all 27 contributors for this article] (2015). Experimental level densities of atomic nuclei. European Physical Journal A. ISSN 1434-6001. 51(12), p. 1–8. doi: 10.1140/epja/i2015-15170-4.
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Sørbø, Solveig & Larsen, Ann-Cecilie (2022). Ann-Cecilie Larsen om kjerneastrofysikk, løping og musikk. [Radio]. radiOrakel og podcast. Show summary
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Larsen, Ann-Cecilie (2021). Solveigs speisa musikk https://radiorakel.no/author/solveigs-speisa-musikk/ Ann-Cecilie Larsen Om Kjerneastrofysikk, Løping Og Musikk. [Radio]. Podkast og radio.
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Larsen, Ann-Cecilie (2021). Abels tårn - om gull og protoner. [Radio]. NRK P2 Ekko.
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Larsen, Ann-Cecilie (2021). Abels tårn - om fusjon. [Radio]. NRK P2 Ekko.
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Larsen, Ann-Cecilie (2021). The quest for the origin of heavy elements.
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Larsen, Ann-Cecilie (2020). A bright-matter mystery: the quest for the origin of the elements.
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Larsen, Ann-Cecilie (2020). Experimentally constrained neutron-capture rates for the intermediate and rapid neutron-capture processes.
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Larsen, Ann-Cecilie (2019). Indirect, experimental constraints of (n,γ) reaction rates for the i- and r-process.
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Larsen, Ann-Cecilie (2019). Constraining neutron-capture rates relevant to r-process and i-process nucleosynthesis.
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Larsen, Ann-Cecilie (2019). Leading an ERC StG research team - some experiences and thoughts.
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Larsen, Ann-Cecilie (2019). Mysteriet i hjertet av atomet - hvor lenge overlever nøytroner på avveie?
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Larsen, Ann-Cecilie (2018). Constraining neutron-capture rates for r-process scenarios.
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Larsen, Ann-Cecilie (2018). The beta-Oslo method: experimentally constrained (n,gamma) reaction rates relevant to the r-process.
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Midtbø, Jørgen E.; Larsen, Ann-Cecilie & Renstrøm, Therese (2018). Extracting γ-strength functions from shell model calculations.
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Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Midtbø, Jørgen E.; Crespo Campo, Lucia; Görgen, Andreas & Ingeberg, Vetle Wegner [Show all 11 contributors for this article] (2017). Gamma-widths, lifetimes and fluctuations in the nuclear quasi-continuum.
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Larsen, Ann-Cecilie (2017). Alkymisten. [Newspaper]. Magasinet, Dagbladet.
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Larsen, Ann-Cecilie (2017). Stjernestøv, supernovaer og atomkjerner – hvordan ble grunnstoffene til?
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Larsen, Ann-Cecilie (2016). Programdeltagelse, Abels tårn. [Radio]. Radio, nettradio (NRK P2).
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Tveten, Gry Merete; Spyrou, Artemis; Schwengner, Ronald; Naqvi, Farheen; Larsen, Ann-Cecilie & Eriksen, Tomas Kvalheim [Show all 23 contributors for this article] (2016). The Statistical Properties Of 92Mo And Implications For The p-process. Show summary
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Larsen, Ann-Cecilie (2016). Novel techniques for constraining neutron-capture rates relevant to heavy-element nucleosynthesis.
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Guttormsen, Magne Sveen; Larsen, Ann-Cecilie; Görgen, Andreas; Renstrøm, Therese; Siem, Sunniva & Tornyi, Tamas Gabor [Show all 7 contributors for this article] (2016). Is the generalized Brink-Axel hypothesis valid?
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Larsen, Ann-Cecilie (2016). Paneldeltager Abels tårn, Ekko P2. [Radio]. Realfagsbiblioteket, UiO.
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Larsen, Ann-Cecilie (2016). Experimental level densities and gamma strength functions for nuclear astrophysics.
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Larsen, Ann-Cecilie (2015). Workshop on the (beta-)Oslo method, NSCL/MSU.
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Larsen, Ann-Cecilie (2015). Applying for an ERC Starting Grant - some experiences and thoughts.