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Author  |
n_TOF Collaboration (Sosnin, N.V. et al); Babiano-Suarez, V.; Caballero-Ontanaya, L.; Domingo-Pardo, C.; Ladarescu, I.; Tain, J.L. |
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Title |
Measurement of the 78Se(n, γ)79Se cross section up to 600 keV at the n_TOF facility at CERN |
Type |
Journal Article |
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Year |
2024 |
Publication |
Physical Review C |
Abbreviated Journal |
Phys. Rev. C |
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Volume |
110 |
Issue |
6 |
Pages |
065805 - 12pp |
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Abstract |
The Se-78(n, gamma)Se-79 cross section has a high impact on the abundances of Se-78 produced during the slow neutron capture process (s process) in massive stars. A measurement of the Se-78 radiative neutron capture cross section has been performed at the Neutron Time-of-Flight facility at CERN using a set of liquid scintillation detectors that have been optimized for a low sensitivity to neutrons. We present resonance capture kernels up to 70 keV and cross section from 70 to 600 keV. Maxwellian-averaged cross section (MACS) values were calculated for stellar temperatures between kT = 5 and 100 keV, with uncertainties between 4.6% and 5.8%. The new MACS values result in substantial decreases of 20-30% of Se-78 abundances produced in the s process in massive stars and AGB stars. Massive stars are now predicted to produce subsolar Se-78/Se-76 ratios, which is expected since Se-76 is an s-only isotope, while solar Se-78 abundances have also contributions from other nucleosynthesis processes. |
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Address |
[Sosnin, N. V.; Lederer-Woods, C.; Garg, R.; Dietz, M.; Lonsdale, S. J.; Murphy, A. St. J.; Woods, P. J.] Univ Edinburgh, Sch Phys & Astron, Edinburgh, Midlothian, Scotland, Email: nikolay.sosnin@manchester.ac.uk |
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Publisher |
Amer Physical Soc |
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Language |
English |
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Original Title |
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Series Volume |
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Edition |
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ISSN |
2469-9985 |
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Notes |
WOS:001389541600005 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
6498 |
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