Artículo
First results of the140ce(N,ү)141ce cross-section measurement at n_tof
Autor/es | Amaducci, Simone
Colonna, Nicola Cosentino, Luigi Cristallo, Sergio Finocchiaro, Paolo Krticka, Milan Cortés Giraldo, Miguel Antonio Guerrero Sánchez, Carlos Lerendegui Marco, Jorge Moreno Soto, Javier Quesada Molina, José Manuel Sabaté Gilarte, Marta Žugec, P. |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2021 |
Fecha de depósito | 2022-10-20 |
Publicado en |
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Resumen | An accurate measurement of the140Ce(n,ү) 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 ... An accurate measurement of the140Ce(n,ү) 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 the140Ce capture cross-section due to a lack of accurate nuclear data. For this measurement, we used a sample of cerium oxide enriched in140Ce 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 the140Ce Maxwellian-averaged cross-section. © 2021 by the authors. Licensee MDPI, Basel, Switzerland. |
Agencias financiadoras | Tokyo Institute of Technology |
Cita | Amaducci, S., Colonna, N., Cosentino, L., Cristallo, S., Finocchiaro, P., Krticka, M.,...,Žugec, . (2021). First results of the140ce(N,ү)141ce cross-section measurement at n_tof. Universe, 7 (6), 200. https://doi.org/10.3390/universe7060200. |
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