Measurement of the &lt;sup&gt;154&lt;/sup&gt;Gd(n,&lt;em&gt;γ&lt;/em&gt;) 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.; Dressler, R.; Heinitz, S.; Kivel, N.; Maugeri, E.; Rochman, D.; Schumann, D.; Talip, Z.; Ulrich, J.; Žugec, P.

doi:10.1016/j.physletb.2020.135405

Measurement of the ¹⁵⁴Gd(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, Dressler R, Heinitz S, Kivel N, Maugeri E, Rochman D, Schumann D, Talip Z, Ulrich J, Žugec P, et al.

Citation

Mazzone, A., Cristallo, S., Aberle, O., Alaerts, G., Alcayne, V., Amaducci, S., … Žugec, P. (2020). Measurement of the ¹⁵⁴Gd(n,γ) cross section and its astrophysical implications. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 804, 135405 (6 pp.). https://doi.org/10.1016/j.physletb.2020.135405

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:31855

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.

Details

Publication Type

Journal Article

Title

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

Author(s)

Mazzone, A.

Cristallo, S.

Aberle, O.

Alaerts, G.

Alcayne, V.

Amaducci, S.