Neutron capture cross section of unstable 63Ni : implications for stellar nucleosynthesis

Lederer, C. and Massimi, C. and Altstadt, S. and Andrzejewski, J. and Audouin, L. and Barbagallo, M. and Becares, V. and Becvar, F. and Belloni, F. and Berthoumieux, E. and Billowes, J. and Boccone, V. and Bosnar, Damir and Brugger, M. and Calviani, M. and Calvino, F. and Cano-Ott, D. and Carrapico, C. and Cerutti, F. and Chiaveri, E. and Chin, M. and Colonna, N. and Cortes, G. and Cortes-Giraldo, M. A. and Diakaki, M. and Domingo-Pardo, C. and Duran, I. and Dressler, R. and Dzysiuk, N. and Eleftheriadis, C. and Ferrari, A. and Fraval, K. and Ganesan, S. and Garcia, A. R. and Giubrone, G. and Gomez-Hornillos, M. B. and Goncalves, I. F. and Gonzalez-Romero, E. and Griesmayer, E. and Guerrero, C. and Gunsing, F. and Gurusamy, P. and Jenkins, D. G. and Jericha, E. and Kadi, Y. and Kappeler, F. and Karadimos, D. and Kivel, N. and Koehler, P. and Kokkoris, M. and Korschinek, G. and Krticka, M. and Kroll, J. and Langer, C. and Leeb, H. and Leong, L. S. and Losito, R. and Manousos, A. and Marganiec, J. and Martinez, T. and Mastinu, P. F. and Mastromarco, M. and Meaze, M. and Mendoza, E. and Mengoni, A. and Milazzo, P. M. and Mingrone, F. and Mirea, M. and Mondelaers, W. and Paradela, C. and Pavlik, A. and Perkowski, J. and Pignatari, M. and Plompen, A. and Praena, J. and Quesada, J. M. and Rauscher, T. and Reifarth, R. and Riego, A. and Roman, F. and Rubbia, C. and Sarmento, R. and Schillebeeckx, P. and Schmidt, S. and Schumann, D. and Tagliente, G. and Tain, J. L. and Tarrio, D. and Tassan-Got, L. and Tsinganis, A. and Valenta, S. and Vannini, G. and Variale, V. and Vaz, P. and Ventura, A. and Versaci, R. and Vermeulen, M. J. and Vlachoudis, V. and Vlastou, R. and Wallner, A. and Ware, T. and Weigand, M. and Weiss, C. and Wright, T. J. and Žugec, Petar (n_TOF Collaboration) (2013) Neutron capture cross section of unstable 63Ni : implications for stellar nucleosynthesis. Physical Review Letters, 110 (2). pp. 22501-5. ISSN 0031-9007

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Abstract

The 63Ni(n ; gamma) cross section has been measured for the rst time at the neutron time-of- flight facility n_TOF at CERN from thermal neutron energies up to 200 keV. In total 16 resonances couldbe identi ed and capture kernels be determined for 14 of these resonances. Maxwellian averaged cross sections were calculated for thermal energies from kT = 5 keV to 90 keV with uncertainties around 20%. Stellar model calculations for a 25 M star show that the new data have a significant effect on the s-process production of 63Cu, 64Ni, and 64Zn in massive stars.

Item Type: Article
Keywords: radiative caputre, resonance reactions, neutron, s-process (nuclear astrophyiscs)
Date: January 2013
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2013) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191005-1021
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 05 Jun 2014 08:42
Last Modified: 23 Feb 2016 15:30
URI: http://digre.pmf.unizg.hr/id/eprint/2220

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