Artículo
Measurement of the 154Gd(n,γ) cross section and its astrophysical implications
Autor/es | Mazzone, A.
Cristallo, S. Aberle, Oliver Alaerts, Gery Alcayne, V. Amaducci, Simone Chiaveri, Enrico Cortés Giraldo, Miguel Antonio Guerrero Sánchez, Carlos Lerendegui Marco, Jorge Quesada Molina, José Manuel Sabaté Gilarte, Marta Žugec, P. |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2020 |
Fecha de depósito | 2022-01-21 |
Publicado en |
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Resumen | The neutron capture cross section of 154Gd was measured from 1 eV to 300 keV in the experimental area
located 185 m from the CERN n_TOF neutron spallation source, using a metallic sample of gadolinium,
enriched to 67% ... The neutron capture cross section of 154Gd was measured from 1 eV to 300 keV in the experimental area located 185 m from the CERN n_TOF neutron spallation source, using a metallic sample of gadolinium, enriched to 67% in 154Gd. The capture measurement, performed with four C6D6 scintillation detectors, has been complemented by a transmission measurement performed at the GELINA time-of-flight facility (JRC-Geel), thus minimising the uncertainty related to sample composition. An accurate Maxwellian averaged capture cross section (MACS) was deduced over the temperature range of interest for s process nucleosynthesis modelling. We report a value of 880(50) mb for the MACS at kT = 30 keV, significantly lower compared to values available in literature. The new adopted 154Gd(n,γ ) cross section reduces the discrepancy between observed and calculated solar s-only isotopic abundances predicted by s-process nucleosynthesis models. |
Cita | Mazzone, A., Cristallo, S., Aberle, O., Alaerts, G., Alcayne, V., Amaducci, S.,...,Žugec, P. (2020). Measurement of the 154Gd(n,γ) cross section and its astrophysical implications. Physics Letters B, 804, 135405. |
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