Measurement of the 154Gd(n,γ ) cross section and its astrophysical implications Porras Sánchez, José Ignacio S process 154Gd Neutron time-of-flight n_TOF The isotope used in this research was supplied by the United States Department of Energy Office of Science by the Isotope Program in the Office of Nuclear Physics. 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. 2020-09-04T07:22:28Z 2020-09-04T07:22:28Z 2020-04-03 info:eu-repo/semantics/article Mazzone, A., Cristallo, S., Aberle, O., Alaerts, G., Alcayne, V., Amaducci, S., ... & Barbagallo, M. (2020). Measurement of the 154Gd (n, γ) cross section and its astrophysical implications. Physics Letters B, 804, 135405. [https://doi.org/10.1016/j.physletb.2020.135405] http://hdl.handle.net/10481/63282 10.1016/j.physletb.2020.135405 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España Elsevier