First 80Se(n,γ) cross section measurement with high resolution in the full stellar energy range 1 eV - 100 keV and its astrophysical implications for the s-process

• Published in: EPJ Web of conferences Vol. 260; p. 11026
• Main Authors: Babiano-Suarez, V, Domingo-Pardo, C, Ladarescu, I, Lerendegui-Marco, J, Calviño, F, Casanovas, A, Guerrero, C, Amaducci, S, Andrzejewski, J, Audouin, L, Barbagallo, M, Berthoumieux, E, Bosnar, D, Caamaño, M, Calviani, M, Cano-Ott, D, Cerutti, F, Chiaveri, E, Colonna, N, Cortés, G, CortésGiraldo, M A, Cosentino, L, Cristallo, S, Damone, L A, Diakaki, M, Dietz, M, Ducasse, Q, Durán, I, Eleme, Z, Fernández-Domínguez, B, Ferrari, A, Finocchiaro, P, Furman, V, Göbel, K, Gawlik-Ramięga, A, Gonçalves, I F, González-Romero, E, Gunsing, F, Heinitz, S, Heyse, J, Jenkins, D G, Junghans, A, Käppeler, F, Kadi, Y, Kimura, A, Krtička, M, Kurtulgil, D, Lederer-Woods, C, Lonsdale, S J, Manna, A, Martínez, T, Masi, A, Massimi, C, Mastinu, P, Mastromarco, M, Maugeri, E A, Mazzone, A, Mendoza, E, Mengoni, A, Milazzo, P M, Mingrone, F, Moreno-Soto, J, Musumarra, A, Negret, A, Nolte, R, Ogállar, F, Oprea, A, Patronis, N, Pavlik, A, Perkowski, J, Persanti, L, Petrone, C, Praena, J, Quesada, J M, Ramos-Doval, D, Rauscher, T, Reifarth, R, Rubbia, C, Sabaté-Gilarte, M, Saxena, A, Sekhar, A, Smith, A G, Sosnin, N V, Sprung, P, Tagliente, G, Tassan-Got, L, Th. Thomas, Torres-Sánchez, P, Tsinganis, A, Ulrich, J, Valenta, S, Vannini, G, Ventura, A, Vescovi, D, Vlachoudis, V, Vlastou, R, Wallner, A, Woods, P J, Wright, T, Žugec, P
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Les Ulis EDP Sciences 01-01-2022
• Subjects: Absorption cross sections; Nuclear capture; Thermal neutrons
• ISSN: 2101-6275; 2100-014X
• DOI: 10.1051/epjconf/202226011026

Most elements heavier than iron have been generated in the stellar media by means of neutron capture reactions, approximately half are produced by the slow neutron capture or s-process. Radiative neutron capture cross section measurements are of fundamental importance for the study of this mechanism. In this contribution we present a brief summary on the measurement and results for the 80Se(n,γ) cross-section. The experiment was carried out at CERN n_TOF EAR1 via the time of flight (ToF) technique, using four C6D6 scintillation detectors with very fast response. More than a hundred new resonances have been analyzed for the first time with a high accuracy. The MACS obtained at kT = 8 keV is 36% smaller than the recommended value in KADo-NiS. Some of the astrophysical implications of this result are elucidated in this contribution.