Measurement of the 154Gd(n,γ) cross section and its astrophysical implications (CROSBI ID 277030)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Mazzone, A. ; ... ; Bosnar, Damir ; ... ; Žugec, Petar
n_TOF Collaboration
engleski
Measurement of the 154Gd(n,γ) cross section and its astrophysical implications
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.
s process ; 154Gd ; Neutron time of flight ; n_TOF
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Podaci o izdanju
804 (135405)
2020.
1-6
objavljeno
0370-2693
1873-2445
10.1016/j.physletb.2020.135405