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Author  |
n_TOF Collaboration (Mucciola, R. et al); Babiano-Suarez, V.; Balibrea-Correa, J.; Domingo-Pardo, C.; Ladarescu, I.; Lerendegui-Marco, J. |
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Title |
Improved 94Mo neutron resonance parameters from neutron capture and transmission measurements at n_TOF and GELINA |
Type |
Journal Article |
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Year |
2026 |
Publication |
Physical Review C |
Abbreviated Journal |
Phys. Rev. C |
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Volume |
114 |
Issue |
3 |
Pages |
034623 - 16pp |
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Abstract |
We report high-resolution measurements of the 94Mo(n, gamma) 95Mo cross section in the neutron energy range from a few eV up to about 250 keV, performed at the n_TOF facility (CERN), and of the 94Mo(n, tot) cross section up to 32 keV, measured at GELINA (JRC Geel). A combined R-matrix analysis of capture and transmission data yields significantly improved neutron-resonance parameters for 94Mo. A total of 186 resonances were observed in this analysis, of which 127 were not present in latest evaluations. The resulting Maxwellian-averaged cross section at stellar temperatures relevant to the slow neutron-capture process (s-process) is approximately 25% lower than previous evaluations and literature values. To assess the astrophysical impact of the revised cross section, we performed s-process nucleosynthesis calculations for low-mass asymptotic giant branch stars. Despite the substantial reduction in the 94Mo(n, gamma) 95Mo rate, the final yields vary by only 3%-4%. This demonstrates that the isotopic budget of 94Mo in asymptotic giant branch stars is primarily governed by the branching flow at 94Nb rather than by the neutron-capture destruction on 94Mo itself. The new cross section thus helps disentangle nuclear cross-section uncertainties from branching-flow effects in the s-process production of 94Mo. |
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Address |
[Mucciola, R.; Cristallo, S.; Vescovi, D.; Piersanti, L.] Ist Nazl Fis Nucl, Sez Perugia, Perugia, Italy |
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Publisher |
Amer Physical Soc |
Place of Publication |
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Language |
English |
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Original Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
2469-9985 |
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Notes |
WOS:001886746300002 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7467 |
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