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

n-TOF Collaboration, Mirco Dietz, Ruchi Garg, C. Lederer-Woods, P. J. Woods

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

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 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.
Original languageEnglish
Article number135405
JournalPhysics Letters B
Early online date3 Apr 2020
DOIs
Publication statusPublished - 10 May 2020

Keywords / Materials (for Non-textual outputs)

  • nucl-ex

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