Artículo
Measurement of the Ce 140 (n,γ) Cross Section at n_TOF and Its Astrophysical Implications for the Chemical Evolution of the Universe
Autor/es | Amaducci, S.
Colonna, Nicola Cosentino, Luigi Cristallo, Sergio Finocchiaro, Paolo Krtička, Milan Massimi, C. Mastromarco, Mario Mazzone, A. Maugeri, E. A. Mengoni, A. Roederer, I. U. Straniero, O. Valenta, S. Vescovi, D. Aberle, Oliver Cortés Giraldo, Miguel Antonio ![]() ![]() ![]() ![]() ![]() ![]() ![]() Guerrero Sánchez, Carlos ![]() ![]() ![]() ![]() ![]() ![]() ![]() Lerendegui Marco, Jorge Moreno Soto, Javier ![]() ![]() ![]() ![]() ![]() ![]() Quesada Molina, José Manuel ![]() ![]() ![]() ![]() ![]() ![]() ![]() Žugec, P. n_TOF Collaboration (Autoría grupal) |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2024-03-22 |
Fecha de depósito | 2024-07-03 |
Publicado en |
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Resumen | Ce140(n,γ) is a key reaction for slow neutron-capture (s-process) nucleosynthesis due to being a bottleneck in the reaction flow. For this reason, it was measured with high accuracy (uncertainty ≈5%) at the n_TOF facility, ... Ce140(n,γ) is a key reaction for slow neutron-capture (s-process) nucleosynthesis due to being a bottleneck in the reaction flow. For this reason, it was measured with high accuracy (uncertainty ≈5%) at the n_TOF facility, with an unprecedented combination of a high purity sample and low neutron-sensitivity detectors. The measured Maxwellian averaged cross section is up to 40% higher than previously accepted values. Stellar model calculations indicate a reduction around 20% of the s-process contribution to the Galactic cerium abundance and smaller sizeable differences for most of the heavier elements. No variations are found in the nucleosynthesis from massive stars. |
Agencias financiadoras | National Science Foundation (NSF). United States European Union (UE) |
Identificador del proyecto | AST 1613536
![]() AST 1815403/1815767 ![]() AST 2205847 ![]() PHY 1430152 ![]() RFF M4C2 1.1 PRIN 2022 ![]() |
Cita | Amaducci, S., Colonna, N., Cosentino, L., Cristallo, S., Finocchiaro, P., Krtička, M.,...,n_TOF Collaboration (Autoría grupal), (2024). Measurement of the Ce 140 (n,γ) Cross Section at n_TOF and Its Astrophysical Implications for the Chemical Evolution of the Universe. Physical Review Letters, 132 (12), 122701. https://doi.org/10.1103/PhysRevLett.132.122701. |
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