Ponencia
New detection systems for an enhanced sensitivity in key stellar (n,gamma) measurements
Autor/es | Lerendegui Marco, Jorge
Babiano Suárez, V. Balibrea Correa, J. Domingo Pardo, César Ladarescu, I. Tarifeno Saldivia, A. Alcayne, V. Cano-Ott, D. González-Romero, E. Martínez, T. Mendoza, E. Guerrero, C. Cortés Giraldo, Miguel Antonio Pérez Maroto, Pablo Quesada Molina, José Manuel Zugec, P. n_TOF Collaboration (Autoría grupal) |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2023 |
Fecha de depósito | 2024-05-22 |
Publicado en |
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ISBN/ISSN | 2100-014X |
Resumen | Neutron capture cross-section measurements are fundamental in the study of astrophysical phenomena, such as the slow neutron capture (s-) process of nucleosynthesis operating in red-giant and massive stars. However, neutron ... Neutron capture cross-section measurements are fundamental in the study of astrophysical phenomena, such as the slow neutron capture (s-) process of nucleosynthesis operating in red-giant and massive stars. However, neutron capture measurements via the time-of-flight (TOF) technique on key s-process nuclei are often challenging. Difficulties arise from the limited mass (similar to mg) available and the high sample-related background in the case of the unstable s-process branching points. Measurements on neutron magic nuclei, that act as s-process bottlenecks, are affected by low (n,gamma) cross sections and a dominant neutron scattering background. Overcoming these experimental challenges requires the combination of facilities with high instantaneous flux, such as n_TOF-EAR2, with detection systems with an enhanced detection sensitivity and high counting rate capabilities. This contribution reviews some of the latest detector developments in detection systems for (n,gamma) measurements at n_TOF, such as i-TED, an innovative detection system which exploits the Compton imaging technique to reduce the dominant neutron scattering background and s-TED, a highly segmented total energy detector intended for high flux facilities. The discussion will be illustrated with results of the first measurement of key the s-process branching-point reaction Se-79(n,gamma). |
Agencias financiadoras | European Union (UE) Ministerio de Ciencia e Innovación (MICIN). España Consejo Superior de Investigaciones Científicas (CSIC) |
Identificador del proyecto | 681740
FJC2020-044688-I ICJ220-045122-I PID2019- 104714GB-C21 FPA2017-83946-C2-1-P FIS2015-71688-ERC PIE-201750I26 |
Cita | Lerendegui Marco, J., Babiano Suárez, V., Balibrea Correa, J., Domingo Pardo, C., Ladarescu, I., Tarifeno Saldivia, A.,...,n_TOF Collaboration (Autoría grupal), (2023). New detection systems for an enhanced sensitivity in key stellar (n,gamma) measurements. En 10th Conference on Nuclear Physics in Astrophysics (NPA) (13001-), Geneva, Switzerland: E D P Sciences. |
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New detection systems.pdf | 2.576Mb | [PDF] | Ver/ | Versión publicada |