Istituto di Cristallografia - CNR

New detection systems for an enhanced sensitivity in key stellar (n,?) measurements

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).

Anno
2023
Rivista
EPJ web of conferences
Impact factor
0.3
AMBITI DI RICERCA
KEYWORDS
Autori
Lerendegui-Marco, J.; Babiano-Suarez, V.; Balibrea-Correa, J.; Domingo-Pardo, C.; Ladarescu, I.; Tarifeno-Saldivia, A.; Alcayne, V.; Cano-Ott, D.; Gonzalez-Romero, E.; Martinez, T.; Mendoza, E.; Guerrero, C.; Calvino, F.; Casanovas, A.; Koster, U.; Chiera, N. M.; Dressler, R.; Maugeri, E. A.; Schumann, D.; Aberle, O.; Altieri, S.; Amaducci, S.; Andrzejewski, J.; Bacak, M.; Beltrami, C.; Bennett, S.; Bernardes, A. P.; Berthoumieux, E.; Beyer, R.; Boromiza, M.; Bosnar, D.; Caamano, M.; Calviani, M.; Cerutti, F.; Cescutti, G.; Chiaveri, E.; Colombetti, P.; Colonna, N.; Camprini, P. Console; Cortes, G.; Cortes-Giraldo, M. A.; Cosentino, L.; Cristallo, S.; Dellmann, S.; Di Castro, M.; Di Maria, S.; Diakaki, M.; Dietz, M.; Dupont, E.; Duran, I.; Eleme, Z.; Fargier, S.; Fernandez, B.; Fernandez-Dominguez, B.; Finocchiaro, P.; Fiore, S.; Garcia-Infantes, F.; Gawlik-Ramiega, A.; Gervino, G.; Gilardoni, S.; Gunsing, F.; Gustavino, C.; Heyse, J.; Hillman, W.; Jenkins, D. G.; Jericha, E.; Junghans, A.; Kadi, Y.; Kaperoni, K.; Kaur, G.; Kimura, A.; Knapova, I.; Kokkoris, M.; Krticka, M.; Kyritsis, N.; Lederer-Woods, C.; Lerner, G.; Manna, A.; Masi, A.; Massimi, C.; Mastinu, P.; Mastromarco, M.; Mazzone, A.; Mengoni, A.; Michalopoulou, V.; Milazzo, P. M.; Mucciola, R.; Murtas, F.; Musacchio-Gonzalez, E.; Musumarra, A.; Negret, A.; de Rada, A. Perez; Perez-Maroto, P.; Patronis, N.; Pavon-Rodriguez, J. A.; Pellegriti, M. G.; Perkowski, J.; Petrone, C.; Pirovano, E.; Plaza, J.; Pomp, S.; Porras, I.; Praena, J.; Quesada, J. M.; Reifarth, R.; Rochman, D.; Romanets, Y.; Rubbia, C.; Sanchez-Caballero, A.; Sabate-Gilarte, M.; Schillebeeckx, P.; Sekhar, A.; Smith, A. G.; Sosnin, N. V.; Stamati, M. E.; Sturniolo, A.; Tagliente, G.; Tarrio, D.; Torres-Sanchez, P.; Vagena, E.; Valenta, S.; Variale, V.; Vaz, P.; Vecchio, G.; Vescovi, D.; Vlachoudis, V.; Vlastou, R.; Wallner, A.; Woods, P. J.; Wright, T.; Zarrella, R.; Zugec, P.
Autori IC CNR
Mazzone Annamaria
DOI
10.1051/epjconf/202327913001