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Direct Mass Measurements to Inform the Behavior of
Hoff, D E M; Kolos, K; Misch, G W; Ray, D; Liu, B; Valverde, A A; Brodeur, M; Burdette, D P; Callahan, N; Clark, J A; Gallant, A T; Kondev, F G; Morgan, G E; Mumpower, M R; Orford, R; Porter, W S; Rivero, F; Savard, G; Scielzo, N D; Sharma, K S; Sieja, K; Sprouse, T M; Varriano, L.
Afiliación
  • Hoff DEM; Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
  • Kolos K; Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
  • Misch GW; Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Ray D; Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada.
  • Liu B; Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
  • Valverde AA; Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
  • Brodeur M; Department of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, USA.
  • Burdette DP; Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada.
  • Callahan N; Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
  • Clark JA; Department of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, USA.
  • Gallant AT; Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
  • Kondev FG; Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
  • Morgan GE; Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
  • Mumpower MR; Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
  • Orford R; Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
  • Porter WS; Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
  • Rivero F; Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
  • Savard G; Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Scielzo ND; Center for Theoretical Astrophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Sharma KS; Joint Institute for Nuclear Astrophysics-Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA.
  • Sieja K; Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
  • Sprouse TM; Department of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, USA.
  • Varriano L; Department of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, USA.
Phys Rev Lett ; 131(26): 262701, 2023 Dec 29.
Article en En | MEDLINE | ID: mdl-38215364
ABSTRACT
Nuclear isomer effects are pivotal in understanding nuclear astrophysics, particularly in the rapid neutron-capture process where the population of metastable isomers can alter the radioactive decay paths of nuclei produced during astrophysical events. The ß-decaying isomer ^{128m}Sb was identified as potentially impactful since the ß-decay pathway along the A=128 isobar funnels into this state bypassing the ground state. We report the first direct mass measurements of the ^{128}Sb isomer and ground state using the Canadian Penning Trap mass spectrometer at Argonne National Laboratory. We find mass excesses of -84564.8(25) keV and -84608.8(21) keV, respectively, resulting in an excitation energy for the isomer of 43.9(33) keV. These results provide the first key nuclear data input for understanding the role of ^{128m}Sb in nucleosynthesis, and we show that it will influence the flow of the rapid neutron-capture process.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2023 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2023 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos