First 80Se(n,γ) cross section measurement with high resolution in the full stellar energy range 1 eV - 100 keV and its astrophysical implications for the s-process

The n_TOF Collaboration, T. Rauscher

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Abstract

Most elements heavier than iron have been generated in the stellar media by means of neutron capture reactions, approximately half are produced by the slow neutron capture or s-process. Radiative neutron capture cross section measurements are of fundamental importance for the study of this mechanism. In this contribution we present a brief summary on the measurement and results for the 80Se(n,γ) cross-section. The experiment was carried out at CERN n_TOF EAR1 via the time of flight (ToF) technique, using four C6D6 scintillation detectors with very fast response. More than a hundred new resonances have been analyzed for the first time with a high accuracy. The MACS obtained at kT = 8 keV is 36% smaller than the recommended value in KADoNiS. Some of the astrophysical implications of this result are elucidated in this contribution.

Original languageEnglish
Pages1-8
Number of pages8
DOIs
Publication statusPublished - 24 Feb 2022
Event16th Symposium on Nuclei in the Cosmos, NIC-XVI 2021 - Chengdu, China
Duration: 21 Sept 202125 Sept 2021
Conference number: 16
https://www.aconf.org/conf_180689.html

Conference

Conference16th Symposium on Nuclei in the Cosmos, NIC-XVI 2021
Country/TerritoryChina
CityChengdu
Period21/09/2125/09/21
OtherNuclei in the Cosmos is the most important international meeting in the field of nuclear astrophysics. It brings together nuclear experimentalists, nuclear theorists, astronomers, theoretical astrophysicists, cosmo-chemists, and others interested in the scientific questions at the interface of nuclear physics and astrophysics. These questions concern, for example, the origin of the elements in the cosmos and the nuclear reactions that occur in the big bang, in stars, and in stellar explosions.
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