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Measurement of the $^{154}$Gd(n,γ) cross section and its astrophysical implications

Mazzone, A.; Cristallo, S.; Aberle, O.; Alaerts, G.; Alcayne, V.; Amaducci, S.; Andrzejewski, J.; Audouin, L.; Babiano-Suarez, V.; Bacak, M.; Barbagallo, M.; Bécares, V.; Bečvář, F.; Bellia, G.; Berthoumieux, E.; Billowes, J.; Bosnar, D.; Brown, A.S.; Busso, M.; Caamaño, M.; ... mehr

Abstract:
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.

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Verlagsausgabe §
DOI: 10.5445/IR/1000118098
Veröffentlicht am 08.05.2020
Originalveröffentlichung
DOI: 10.1016/j.physletb.2020.135405
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Kernphysik (IKP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 04.2020
Sprache Englisch
Identifikator ISSN: 0370-2693
KITopen-ID: 1000118098
HGF-Programm 51.03.04 (POF III, LK 01)
Kosmische Strahlung Technologien
Erschienen in Physics letters / B
Band 804
Seiten Article: 135405
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Schlagwörter s process; 154Gd; Neutron time of flight; n_TOF
Nachgewiesen in Scopus
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