%0 Journal Article
%T Measurement of the 140Ceðn;γþ Cross Section at n_TOF and Its Astrophysical Implications for the Chemical Evolution of the Universe
%A n_TOF Collaboration (Amaducci, S. et al
%A Babiano-Suarez, V.
%A Caballero-Ontanaya, L.
%A Domingo-Pardo, C.
%A Ladarescu, I.
%A Tain, J. L.
%A Tarifeño-Saldivia, A.
%J Physical Review Letters
%D 2024
%V 132
%N 12
%I Amer Physical Soc
%@ 0031-9007
%G English
%F n_TOFCollaborationAmaducci_etal2024
%O WOS:001202102900011
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=6074), last updated on Fri, 26 Apr 2024 13:32:21 +0000
%X 140Ce(n, gamma) is a key reaction for slow neutron -capture (s -process) nucleosynthesis due to being a bottleneck in the reaction flow. For this reason, it was measured with high accuracy (uncertainty approximate to 5%) at the n_TOF facility, with an unprecedented combination of a high purity sample and low neutron -sensitivity detectors. The measured Maxwellian averaged cross section is up to 40% higher than previously accepted values. Stellar model calculations indicate a reduction around 20% of the s -process contribution to the Galactic cerium abundance and smaller sizeable differences for most of the heavier elements. No variations are found in the nucleosynthesis from massive stars.
%R 10.1103/PhysRevLett.132.122701
%U https://doi.org/10.1103/PhysRevLett.132.122701
%P 122701-8pp