Eivind Osnes

• Kuo, T.T.S.; Kuo, T.K.; Osnes, Eivind & Shu, S. (2017). Nucleon-anti-nucleon intruder state of Dirac equation for nucleon in deep scalar potential well. International Journal of Modern Physics E.  ISSN 0218-3013.  26(1-2) . doi: 10.1142/S0218301317400134
• Kuo, T.T.S.; Holt, J. W. & Osnes, Eivind (2016). Introduction to low-momentum effective interactions with Brown-Rho scaling and three-nucleon forces. Physica Scripta.  ISSN 0031-8949.  91(3) . doi: 10.1088/0031-8949/91/3/033009
• Osnes, Eivind; Engeland, Torgeir & Hjorth-Jensen, Morten (2015). Large-scale shell-model study of the Sn isotopes. The European Physical Journal Conferences.  ISSN 2101-6275.  95:01010, s 1- 4 . doi: 10.1051/epjconf/20159501010
• Engeland, Torgeir; Hjorth-Jensen, Morten; Kartamyshev, Maxim & Osnes, Eivind (2014). The Kuo–Brown effective interaction: From 18O to the Sn isotopes. Nuclear Physics A.  ISSN 0375-9474.  928, s 51- 63 . doi: 10.1016/j.nuclphysa.2014.03.012
• Kartamychev, Maxim; Engeland, Torgeir; Hjorth-Jensen, Morten & Osnes, Eivind (2007). Effective interactions and shell model studies of heavy tin isotopes. Physical Review C. Nuclear Physics.  ISSN 0556-2813.  76 . doi: 10.1103/PhysRevC.76.024313 Vis sammendrag

  We present results from large-scale shell model calculations of even and odd tin isotopes from 134Sn to 142Sn with a shell model space defined by the 1f7/2, 2p3/2, 0h9/2, 2p1/2, 1f5/2, and 0i13/2 single-particle orbits. An effective two-body interaction based on modern nucleon-nucleon interactions is employed. The shell model results are in turn analyzed for their pairing content using a generalized seniority approach. Our results indicate that a pairing model picture captures a great deal of the structure and the correlations of the lowest lying states for even and odd isotopes.

• Ellis, Paul; Engeland, Torgeir; Hjorth-Jensen, Morten; Kartamyshev, Maximx & Osnes, Eivind (2005). Model calculation of effective three-body forces. Physical Review C. Nuclear Physics.  ISSN 0556-2813.  71, s 034301 Vis sammendrag

  We propose a scheme for extracting an effective three-body interaction originating from a two-nucleon interaction. This is based on the Q-box method of Kuo and collaborators, where folded diagrams are obtained by differentiating a sum of nonfolded diagrams with respect to the starting energy. To gain insight we have studied several examples using the Lipkin model where the perturbative approach can be compared with exact results. Numerically the three-body interactions can be significant and in a matrix example good accuracy was not obtained simultaneously for both eigenvalues with two-body interactions alone.

• Dean, David J.; Engeland, Torgeir; Hjorth-Jensen, Morten; Kartamychev, Maxim & Osnes, Eivind (2004). Effective interactions and the nuclear shell-model. Progress in Particle and Nuclear Physics.  ISSN 0146-6410.  53, s 419- 500 Vis sammendrag

  This review aims at a critical discussion of the interplay between effective interactions derived from various many-body approaches and spectroscopic data extracted from large scale shell-model studies. To achieve this, our many-body scheme starts with the free nucleon-nucleon (NN) interaction, typically modelled on various meson exchanges. The NN interaction is in turn renormalized in order to derive an effective medium dependent interaction. The latter is in turn used in shell-model calculations of selected nuclei. We also describe how to sum up the parquet class of diagrams and present initial uses of the effective interactions in coupled cluster many-body theory.

• Lipoglavsek, M.; Baktash, C.; Blomqvist, Jan; Dean, David J.; Engeland, Torgeir; Fahlander, C.; Hjorth-Jensen, Morten; Janssens, Robert V. F.; Likar, A.; Osnes, Eivind & Paul, S.D. (2002). Break-up of the Doubly-magic 100Sn core. Physical Review C. Nuclear Physics.  ISSN 0556-2813.  66, s 011302
• Lipoglavsek, M.; Baktash, C.; Carpenter, M.P.; Dean, David J.; Engeland, Torgeir; Fahlander, C.; Hjorth-Jensen, Morten & Osnes, Eivind (2002). Excited states of the proton emitter 105Sb. Physical Review C. Nuclear Physics.  ISSN 0556-2813.  65, s 051037
• Lipoglavsek, M.; Baktash, C.; Carpenter, M.P.; Dean, David J.; Engeland, Torgeir; Hjorth-Jensen, Morten & Osnes, Eivind (2002). Core excitations in 102In. Physical Review C. Nuclear Physics.  ISSN 0556-2813.  65, s 021302(R
• Elgarøy, Øystein; Engeland, Torgeir; Hjorth-Jensen, Morten & Osnes, Eivind (2001). Pairing correlations in nuclear systems, from infinite nuclear matter to finite nuclei. International Journal of Modern Physics B.  ISSN 0217-9792.  15, s 1501- 1509
• Engeland, Torgeir; Hjorth-Jensen, Morten & Osnes, Eivind (2000). Shell model studies of the proton drip line nucleus ¹⁰⁶Sb. Physical Review C. Nuclear Physics.  ISSN 0556-2813.  61, s r00010- r00015
• Holt, Anne; Engeland, Torgeir; Hjorth-Jensen, Morten & Osnes, Eivind (2000). Applications of realistic effective interactions to the structure of Zr isotopes. Physical Review C. Nuclear Physics.  ISSN 0556-2813.  61
• Elgarøy, Øystein; Engvik, Lars; Hjorth-Jensen, Morten & Osnes, Eivind (1998). Minimal relativity and <SUP>3</SUP>S<SUB>1</SUB>-<SUP>3</SUP>D<SUB>1</SUB> pairing in symmetric nuclear matter. Physical Review C. Nuclear Physics.  ISSN 0556-2813.  57, s 1069- 1072
• Holt, Anne; Engeland, Torgeir; Hjorth-Jensen, Morten & Osnes, Eivind (1998). Shell-model calculations of heavy Sn isotopes. Nuclear Physics A.  ISSN 0375-9474.  634, s 41- 56
• Suhonen, Jouni; Toivanen, Jussi; Engeland, Torgeir; Hjorth-Jensen, Morten; Holt, Anne & Osnes, Eivind (1998). Study of odd-mass N=82 isotones: comparison of the microscopic quasiparticle-phonon model and the nuclear shell model. Nuclear Physics A.  ISSN 0375-9474.  628, s 41- 61
• Engvik, Lars; Hjorth-Jensen, Morten; Osnes, Eivind & Kuo, T. (1997). Ring-diagram calculations of nuclear matter with different model spaces. Nuclear Physics A.  ISSN 0375-9474.  622, s 553- 572
• Holt, Anne; Engeland, Torgeir; Hjorth-Jensen, Morten; Osnes, Eivind & Suhonen, Jouni (1997). The structure of the N=82 isotones with realistic effective interactions. Nuclear Physics A.  ISSN 0375-9474.  618, s 107- 125
• Sandulescu, N.; Liotta, Roberto; Blomqvist, Jan; Engeland, Torgeir; Hjorth-Jensen, Morten; Holt, Anne & Osnes, Eivind (1997). Generalized seniority scheme in light tin isotopes. Physical Review C. Nuclear Physics.  ISSN 0556-2813.  55, s 2708- 2710
• Elgarøy, Øystein; Engvik, Lars; Hjorth-Jensen, Morten & Osnes, Eivind (1996). Model-space approach to ¹S₀ neutron and proton pairing in neutron star matter with the Bonn meson-exchange potentials. Nuclear Physics A.  ISSN 0375-9474.  604, s 466- 490
• Elgarøy, Øystein; Engvik, Lars; Hjorth-Jensen, Morten & Osnes, Eivind (1996). Superfluidity in _b-stable neutron star matter. Physical Review Letters.  ISSN 0031-9007.  77, s 1428- 1431
• Elgarøy, Øystein; Engvik, Lars; Hjorth-Jensen, Morten & Osnes, Eivind (1996). Triplet pairing of neutrons in _b-stable neutron star matter. Nuclear Physics A.  ISSN 0375-9474.  607, s 425- 441
• Elgarøy, Øystein; Engvik, Lars; Osnes, Eivind; Blasio, Fabio V. de; Lazzari, Gianluca & Hjorth-Jensen, Morten (1996). Emissivities of neutrinos in neutron stars. Physical Review Letters.  ISSN 0031-9007.  76, s 1994- 1997
• Elgarøy, Øystein; Engvik, Lars; Osnes, Eivind; Blasio, Fabio V. de; Lazzari, Gianluca & Hjorth-Jensen, Morten (1996). Superfluidity and neutron star crust matter. Physical Review D. Particles and fields.  ISSN 0556-2821.  54, s 1848- 1851
• Engvik, Lars; Hjorth-Jensen, Morten; Osnes, Eivind; Bao, G. & Østgård, Erlend (1996). Asymmetric Nuclear Matter and Neutron Star Properties. Astrophysical Journal (ApJ).  ISSN 0004-637X.  469, s 794
• Hjorth-Jensen, Morten; Osnes, Eivind; Muther, Herbert & Polls, Artur (1996). Comparison of the effective interaction to various orders in different mass regions. Journal of Physics G: Nuclear and Particle Physics.  ISSN 0954-3899.  22, s 321- 329
• Engeland, Torgeir; Hjorth-Jensen, Morten; Holt, Anne & Osnes, Eivind (1995). Large shell model calculations with realistic effective interactions. Physica Scripta.  ISSN 0031-8949.  T56, s 58- 66
• Hjorth-Jensen, Morten; Kuo, T. & Osnes, Eivind (1995). Realistic effective interactions for nuclear systems. Physics reports.  ISSN 0370-1573.  261, s 125- 270
• Bao, G.; Engvik, Lars; Hjorth-Jensen, Morten; Osnes, Eivind & Ostgaard, Erlend (1994). New equations of state for neutron stars. Nuclear Physics A.  ISSN 0375-9474.  575, s 707- 732
• Engvik, Lars; Hjorth-Jensen, Morten; Osnes, Eivind; Bao, G. & ostgaard, Erlend (1994). Asymmetric nuclear matter and neutron star properties. Physical Review Letters.  ISSN 0031-9007.  73, s 2650- 2653
• Ellis, P.J.; Engeland, Torgeir; Hjorth-Jensen, Morten; Holt, Anne & Osnes, Eivind (1994). Convergence properties of the effective interaction. Nuclear Physics A.  ISSN 0375-9474.  573, s 216- 230
• Hjorth-Jensen, Morten; Engeland, Torgeir; Holt, Anne & Osnes, Eivind (1994). Perturbative many-body approaches to finite nuclei. Physics reports.  ISSN 0370-1573.  242, s 37- 69
• Holt, Anne; Engeland, Torgeir; Hjorth-Jensen, Morten & Osnes, Eivind (1994). The structure of the neutron deficient Sn isotopes. Nuclear Physics A.  ISSN 0375-9474.  570, s 137c- 144c
• Engeland, Torgeir; Hjorth-Jensen, Morten; Holt, Anne & Osnes, Eivind (1993). The structure of the neutron deficient Sn isotopes. Physical Review C. Nuclear Physics.  ISSN 0556-2813.  48, s R535- R538
• Hjorth-Jensen, Morten; Engeland, Torgeir; Holt, Anne & Osnes, Eivind (1992). Effective interactions for valence-hole nuclei with modern meson-exchange potential models. Nuclear Physics A.  ISSN 0375-9474.  541, s 105- 130
• Hjorth-Jensen, Morten; Osnes, Eivind & Kuo, T. (1992). Effective interactions for valence-hole nuclei with modern meson-exchange potential models. Nuclear Physics A.  ISSN 0375-9474.  540, s 145- 170
• Hjorth-Jensen, Morten; Osnes, Eivind & Muther, Herbert (1992). Folded-Diagram effective interaction with the Bonn meson-exchange potential model. Annals of Physics.  ISSN 0003-4916.  213, s 102- 134
• Hjorth-Jensen, Morten & Osnes, Eivind (1990). Number-conserving sets and effective interactions through third order for mass-18 with the Bonn potential. Physica Scripta.  ISSN 0031-8949.  41, s 207- 212
• Hjorth-Jensen, Morten; Osnes, Eivind; Muther, Herbert & Schmid, K.W. (1990). Choice of single-particle potential and the convergence of the effective interaction. Physics Letters B.  ISSN 0370-2693.  248, s 243- 249
• Hjorth-Jensen, Morten & Osnes, Eivind (1989). Effective interactions through third order for mass-18 nuclei with the Paris potential. Physics Letters B.  ISSN 0370-2693.  228, s 281- 284
• Guttormsen, Magne Sveen; Pedersen, Torstein; Rekstad, John Bernhard; Engeland, Torgeir; Osnes, Eivind & Ingebretsen, Finn (1980). The particle-rotor model with pairing in the s-d shell: An analysis of the 23Na nucleus. Nuclear Physics A.  ISSN 0375-9474.  338, s 141
• Osnes, Eivind; Guttormsen, Magne Sveen & et al.,, - (1979). The Iπ = 1/2− bands in the odd-A = 19–31 nuclei. Nuclear Physics A.  ISSN 0375-9474.  332, s 1
• Guttormsen, Magne Sveen; Osnes, Eivind; Rekstad, John Bernhard; Løvhøiden, Gunnar & et al.,, - (1978). Particle-rotor model description of the negative-parity states in the transitional 151Sm nucleus. Nuclear Physics A.  ISSN 0375-9474.  298, s 122

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• Kartamychev, Maxim; Hjorth-Jensen, Morten; Engeland, Torgeir & Osnes, Eivind (2007). Three-body effective interactions in nuclear structure studies.
• Kartamychev, Maxim; Hjorth-Jensen, Morten; Engeland, Torgeir & Osnes, Eivind (2007). Three-body interactions in nuclear structure studies.
• Kartamyshev, Maxim; Hjorth-Jensen, Morten; Engeland, Torgeir & Osnes, Eivind (2007). Realistic three-nucleon effective interactions in nuclear structure studies.
• Kartamyshev, Maxim; Hjorth-Jensen, Morten; Engeland, Torgeir & Osnes, Eivind (2007). Three-body effective interactions in nuclear structure studies.
• Kartamychev, Maxim; Hjorth-Jensen, Morten; Engeland, Torgeir & Osnes, Eivind (2006). Realistic Three-Nucleon Effective Interaction from the Folded-Diagram Theory.
• Kartamychev, Maxim; Hjorth-Jensen, Morten; Engeland, Torgeir & Osnes, Eivind (2006). Realistic Three-Nucleon Effective Interaction from the Folded-Diagram Theory.
• Huseby, Arne & Osnes, Eivind (2004). Må pasienten få det verre for å få det bedre?. Uniforum.  ISSN 1891-5825.  (16)
• Huseby, Arne & Osnes, Eivind (2004). Budsjettet for 2005 og konekvenser for virksomheten ved grunnenhetene. Åpent brev til rektor. Uniforum.  ISSN 1891-5825.  (14)
• Norum, Kaare Reidar; Blakar, Rolv Mikkel; Handal, Gunnar; Hansen, Cathrine Fabricius; Jacobsen, Ingeborg; Kjønstad, Asbjørn & Osnes, Eivind (2003). Universitetene trenger ingen ny lov. Dagbladet.  ISSN 0805-3766.
• Andersen, Øivind & Osnes, Eivind (2002). Forskning og råd. Dagbladet.  ISSN 0805-3766.
• Engeland, Torgeir; Hjorth-Jensen, Morten & Osnes, Eivind (2000). Effective interactions for medium heavy nuclei.
• Rekstad, John Bernhard; Sagstuen, Einar; Osnes, Eivind & Skaali, Toralf Bernhard (2000). Sviktende evaluering av norsk fysikk. Forskningspolitikk.  ISSN 0333-0273.  23(4), s 20- 21
• Elgarøy, Øystein; Engeland, Torgeir; Hjorth-Jensen, Morten & Osnes, Eivind (1999). Pairing correlations, from finite nuclei to infinite matter.
• Engeland, Torgeir; Hjorth-Jensen, Morten; Holt, Anne & Osnes, Eivind (1998). Realistic Effective Interactions and Large-Scale Nuclear Structure Calculation.
• Engeland, Torgeir; Hjorth-Jensen, Morten; Holt, Anne & Osnes, Eivind (1996). Extensive Shell-Model calculations in the tin isotopes.
• Engeland, Torgeir; Hjorth-Jensen, Morten; Holt, Anne & Osnes, Eivind (1996). Realistic Large basis shell-model calculation in the low-mass tin isotopes.
• Osnes, Eivind; Hjorth-Jensen, Morten; Engeland, Torgeir & Holt, Anne (1993). Shell model calculations with realistic effective interactions.
• Hjorth-Jensen, Morten; Osnes, Eivind; Muther, Herbert; Schmid, K.W. & Kuo, T. (1991). Microscopic nuclear structure calculations with modern meson-exchange potentials}.

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