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        Neutron Capture Cross Section of Unstable Ni-63 : Implications for Stellar Nucleosynthesis

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        1304.3310v1.pdf (PDF, 640Kb)
        Author
        Lederer, C.
        Massimi, C.
        Altstadt, S.
        Andrzejewski, J.
        Audouin, L.
        Barbagallo, M.
        Becares, V.
        Becvar, F.
        Belloni, F.
        Berthoumieux, E.
        Billowes, J.
        Boccone, V.
        Bosnar, D.
        Brugger, M.
        Calviani, M.
        Calvino, F.
        Cano-Ott, D.
        Carrapico, C.
        Cerutti, F.
        Chiaveri, E.
        Chin, M.
        Colonna, N.
        Cortes, G.
        Cortes-Giraldo, M. A.
        Diakaki, M.
        Domingo-Pardo, C.
        Duran, I.
        Dressler, R.
        Dzysiuk, N.
        Eleftheriadis, C.
        Ferrari, A.
        Fraval, K.
        Ganesan, S.
        Garcia, A. R.
        Giubrone, G.
        Gomez-Hornillos, M. B.
        Goncalves, I. F.
        Gonzalez-Romero, E.
        Griesmayer, E.
        Guerrero, C.
        Gunsing, F.
        Gurusamy, P.
        Jenkins, D. G.
        Jericha, E.
        Kadi, Y.
        Kaeppeler, F.
        Karadimos, D.
        Kivel, N.
        Koehler, P.
        Rauscher, T.
        n TOF Collaboration
        Attention
        2299/10408
        Abstract
        The Ni-63(n, gamma) cross section has been measured for the first time at the neutron time-of-flight facility n_TOF at CERN from thermal neutron energies up to 200 keV. In total, capture kernels of 12 (new) resonances were determined. Maxwellian averaged cross sections were calculated for thermal energies from kT = 5-100 keV with uncertainties around 20%. Stellar model calculations for a 25M(circle dot) star show that the new data have a significant effect on the s-process production of Cu-63, Ni-64, and Zn-64 in massive stars, allowing stronger constraints on the Cu yields from explosive nucleosynthesis in the subsequent supernova
        Publication date
        2013-01-08
        Published in
        Physical Review Letters
        Published version
        https://doi.org/10.1103/PhysRevLett.110.022501
        Other links
        http://hdl.handle.net/2299/10408
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