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Radiative Width of the Hoyle State from γ-Ray Spectroscopy.
Kibédi, T; Alshahrani, B; Stuchbery, A E; Larsen, A C; Görgen, A; Siem, S; Guttormsen, M; Giacoppo, F; Morales, A I; Sahin, E; Tveten, G M; Garrote, F L Bello; Campo, L Crespo; Eriksen, T K; Klintefjord, M; Maharramova, S; Nyhus, H-T; Tornyi, T G; Renstrøm, T; Paulsen, W.
Afiliação
  • Kibédi T; Department of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.
  • Alshahrani B; Department of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.
  • Stuchbery AE; Department of Physics, Faculty of Science, King Khalid University, Abha 61413, Saudi Arabia.
  • Larsen AC; Department of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.
  • Görgen A; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Siem S; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Guttormsen M; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Giacoppo F; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Morales AI; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Sahin E; Dipartimento di Fisica dell'Universitá degli Studi di Milano and INFN-Milano, 20133 Milano, Italy.
  • Tveten GM; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Garrote FLB; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Campo LC; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Eriksen TK; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Klintefjord M; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Maharramova S; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Nyhus HT; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Tornyi TG; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Renstrøm T; Department of Physics, University of Oslo, N-0316 Oslo, Norway.
  • Paulsen W; Institute of Nuclear Research, MTA ATOMKI, Debrecen H-4026, Hungary.
Phys Rev Lett ; 125(18): 182701, 2020 Oct 30.
Article em En | MEDLINE | ID: mdl-33196226
ABSTRACT
The cascading 3.21 and 4.44 MeV electric quadrupole transitions have been observed from the Hoyle state at 7.65 MeV excitation energy in ^{12}C, excited by the ^{12}C(p,p^{'}) reaction at 10.7 MeV proton energy. From the proton-γ-γ triple coincidence data, a value of Γ_{rad}/Γ=6.2(6)×10^{-4} was obtained for the radiative branching ratio. Using our results, together with Γ_{π}^{E0}/Γ from Eriksen et al. [Phys. Rev. C 102, 024320 (2020)PRVCAN2469-998510.1103/PhysRevC.102.024320] and the currently adopted Γ_{π}(E0) values, the radiative width of the Hoyle state is determined as Γ_{rad}=5.1(6)×10^{-3} eV. This value is about 34% higher than the currently adopted value and will impact models of stellar evolution and nucleosynthesis.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article