RT Journal Article
T1 First Results of the 140Ce(n,γ)141Ce Cross-Section Measurement at n_TOF
A1 The n_TOF Collaboration, 
A1 Caamaño Fresco, Manuel
A1 Durán Escribano, Ignacio
A1 Fernández Domínguez, Beatriz
K1 Cerium
K1 140Ce
K1 Neutron
K1 Capture
K1 Cross-section
K1 s-process
K1 n_TOF
K1 MACS
K1 Nucleosynthesis
AB An accurate measurement of the 140Ce(n,γ) energy-dependent cross-section was performed at the n_TOF facility at CERN. This cross-section is of great importance because it represents a bottleneck for the s-process nucleosynthesis and determines to a large extent the cerium abundance in stars. The measurement was motivated by the significant difference between the cerium abundance measured in globular clusters and the value predicted by theoretical stellar models. This discrepancy can be ascribed to an overestimation of the 140Ce capture cross-section due to a lack of accurate nuclear data. For this measurement, we used a sample of cerium oxide enriched in 140Ce to 99.4%. The experimental apparatus consisted of four deuterated benzene liquid scintillator detectors, which allowed us to overcome the difficulties present in the previous measurements, thanks to their very low neutron sensitivity. The accurate analysis of the p-wave resonances and the calculation of their average parameters are fundamental to improve the evaluation of the 140Ce Maxwellian-averaged cross-section
PB MDPI
YR 2021
FD 2021
LK http://hdl.handle.net/10347/26724
UL http://hdl.handle.net/10347/26724
LA eng
NO Universe 2021, 7(6), 200; https://doi.org/10.3390/universe7060200
DS Minerva
RD 27 abr 2026