$^{62}$Ni($n,γ$) and $^{63}$Ni($n,γ$) cross sections measured at n_TOF/CERN
Creators: name: Lederer, C.
name: Massimi, C.
name: Berthoumieux, E.
name: Colonna, N.
name: Dressler, R.
name: Guerrero, C.
name: Gunsing, F.
name: Käppeler, F.
name: Kivel, N.
name: Pignatari, M.
name: Reifarth, R.
name: Schumann, D.
name: Wallner, A.
name: Altstadt, S.
name: Andriamonje, S.
name: Andrzejewski, J.
name: Audouin, L.
name: Barbagallo, M.
name: Becares, V.
name: Becvar, F.
name: Belloni, F.
name: Berthier, B.
name: Billowes, J.
name: Boccone, V.
name: Bosnar, D.
name: Brugger, M.
name: Calviani, M.
name: Calvino, F.
name: Cano-Ott, D.
name: Carrapico, C.
name: Cerutti, F.
name: Chiaveri, E.
name: Chin, M.
name: Cortes, G.
name: Cortes-Giraldo, M. A.
name: Dillmann, I.
name: Domingo-Pardo, C.
name: Duran, I.
name: Dzysiuk, N.
name: Eleftheriadis, C.
name: Fernandez-Ordonez, M.
name: Ferrari, A.
name: Fraval, K.
name: Ganesan, S.
name: Garcıa, A. R.
name: Giubrone, G.
name: Gomez-Hornillos, M. B.
name: Goncalves, I. F.
name: Gonzalez-Romero, E.
name: Gramegna, F.
name: Griesmayer, E.
name: Gurusamy, P.
name: Harrisopulos, S.
name: Heil, M.
name: Ioannides, K.
name: Jenkins, D. G.
name: Jericha, E.
name: Kadi, Y.
name: Karadimos, D.
name: Korschinek, G.
name: Krticka, M.
name: Kroll, J.
name: Langer, C.
name: Lebbos, E.
name: Leeb, H.
name: Leong, L. S.
name: Losito, R.
name: Lozano, M.
name: Manousos, A.
name: Marganiec, J.
name: Marrone, S.
name: Martinez, T.
name: Mastinu, P. F.
name: Mastromarco, M.
name: Meaze, M.
name: Mendoza, E.
name: Mengoni, A.
name: Milazzo, P. M.
name: Mingrone, F.
name: Mirea, M.
name: Mondalaers, W.
name: Paradela, C.
name: Pavlik, A.
name: Perkowski, J.
name: Plag, R.
name: Plompen, A.
name: Praena, J.
name: Quesada, J. M.
name: Rauscher, T.
name: Riego, A.
name: Roman, F.
name: Rubbia, C.
name: Sarmento, R.
name: Schillebeeckx, P.
name: Schmidt, S.
name: Tagliente, G.
name: Tain, J. L.
name: Tarrıo, D.
name: Tassan-Got, L.
name: Tsinganis, A.
name: Tlustos, L.
name: Valenta, S.
name: Vannini, G.
name: Variale, V.
name: Vaz, P.
name: Ventura, A.
name: Vermeulen, M. J.
name: Versaci, R.
name: Vlachoudis, V.
name: Vlastou, R.
name: Ware, T.
name: Weigand, M.
name: Weiß, C.
name: Wright, T. J.
name: Zugec, P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The cross section of the $^{62}$Ni($n,γ$) reaction was measured with the time-of-flight technique at the neutron time-of-flight facility n_TOF at CERN. Capture kernels of 42 resonances were analyzed up to 200~keV neutron energy and Maxwellian averaged cross sections (MACS) from $kT=5-100$ keV were calculated. With a total uncertainty of 4.5%, the stellar cross section is in excellent agreement with the the KADoNiS compilation at $kT=30$ keV, while being systematically lower up to a factor of 1.6 at higher stellar temperatures. The cross section of the $^{63}$Ni($n,γ$) reaction was measured for the first time at n_TOF. We determined unresolved cross sections from 10 to 270 keV with a systematic uncertainty of 17%. These results provide fundamental constraints on $s$-process production of heavier species, especially the production of Cu in massive stars, which serve as the dominant source of Cu in the solar system.