Статья

Direct Mass Measurements to Inform the Behavior of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Sb</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>128</mml:mn><mml:mi mathvariant="normal">m</mml:mi></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> in Nucleosynthetic Environments

D. E. M. HoffNuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USAK. KolosNuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USAG. W. MischTheoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USAD. RayDepartment of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, CanadaB. LiuDepartment of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, USAA. A. ValverdeDepartment of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, CanadaM. BrodeurDepartment of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, USAD. P. BurdettePhysics Division, Argonne National Laboratory, Lemont, Illinois 60439, USANathan CallahanPhysics Division, Argonne National Laboratory, Lemont, Illinois 60439, USAJ. A. ClarkPhysics Division, Argonne National Laboratory, Lemont, Illinois 60439, USAA. T. GallantNuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USAF. G. KondevPhysics Division, Argonne National Laboratory, Lemont, Illinois 60439, USAG. E. MorganDepartment of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USAM. R. MumpowerCenter for Theoretical Astrophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USAR. OrfordNuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USAW. S. PorterDepartment of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, USAF. RiveroDepartment of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, USAG. SavardDepartment of Physics, University of Chicago, Chicago, Illinois 60637, USAN. D. ScielzoNuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USAK. S. SharmaDepartment of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, CanadaK. SiejaUniversité de Strasbourg, IPHC, 23 rue du Loess 67037 Strasbourg, France CNRS, UMR7178, 67037 Strasbourg, FranceT. M. SprouseTheoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USAL. VarrianoDepartment of Physics, University of Chicago, Chicago, Illinois 60637, USA

2023lv

ABI

Аннотация

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 β-decaying isomer ^{128m}Sb was identified as potentially impactful since the β-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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Идентификаторы

DOI: 10.1103/physrevlett.131.262701

Цитирования и источники

Цитирований: 2Использованных источников: 0

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