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Comprehensive Test of the Brink-Axel Hypothesis in the Energy Region of the Pygmy Dipole Resonance.
Markova, M; von Neumann-Cosel, P; Larsen, A C; Bassauer, S; Görgen, A; Guttormsen, M; Bello Garrote, F L; Berg, H C; Bjørøen, M M; Dahl-Jacobsen, T; Eriksen, T K; Gjestvang, D; Isaak, J; Mbabane, M; Paulsen, W; Pedersen, L G; Pettersen, N I J; Richter, A; Sahin, E; Scholz, P; Siem, S; Tveten, G M; Valsdottir, V M; Wiedeking, M; Zeiser, F.
  • Markova M; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • von Neumann-Cosel P; Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
  • Larsen AC; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Bassauer S; Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
  • Görgen A; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Guttormsen M; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Bello Garrote FL; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Berg HC; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Bjørøen MM; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Dahl-Jacobsen T; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Eriksen TK; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Gjestvang D; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Isaak J; Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
  • Mbabane M; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Paulsen W; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Pedersen LG; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Pettersen NIJ; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Richter A; Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
  • Sahin E; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Scholz P; Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany.
  • Siem S; Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556-5670, USA.
  • Tveten GM; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Valsdottir VM; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Wiedeking M; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Zeiser F; Department of Subatomic Physics, iThemba LABS, Somerset West 7129, South Africa.
Phys Rev Lett ; 127(18): 182501, 2021 Oct 29.
Article en En | MEDLINE | ID: mdl-34767384
ABSTRACT
The validity of the Brink-Axel hypothesis, which is especially important for numerous astrophysical calculations, is addressed for ^{116,120,124}Sn below the neutron separation energy by means of three independent experimental methods. The γ-ray strength functions (GSFs) extracted from primary γ-decay spectra following charged-particle reactions with the Oslo method and with the shape method demonstrate excellent agreement with those deduced from forward-angle inelastic proton scattering at relativistic beam energies. In addition, the GSFs are shown to be independent of excitation energies and spins of the initial and final states. The results provide a critical test of the generalized Brink-Axel hypothesis in heavy nuclei, demonstrating its applicability in the energy region of the pygmy dipole resonance.
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Año: 2021 Tipo del documento: Article
Texto completo
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XML
PubMed Links
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Año: 2021 Tipo del documento: Article