Experimental neutron capture data of $^{58}$Ni from the CERN n_TOF facility

Collaboration, n_TOF; Žugec, Petar; ?ugec, P.; Barbagallo, M.; Colonna, Nicola; Bosnar, D.; Altstadt, S.; Andrzejewski, J.; Audouin, L.; Bécares, V.; Be?vá?, F.; Bečvář, F.; Belloni, F.; Berthoumieux, E.; Billowes, J.; :.,; Boccone, V.; Brugger, M.; Calviani, M.; Calviño, F.; Becares, V.; Cano-Ott, D.; Carrapiço, C.; Cerutti, F.; Chiaveri, E.; Carrapi?o, C.; Chin, M.; Cortés, G.; Cortés-Giraldo, Miguel Antonio; Diakaki, M.; Domingo-Pardo, César; Becvár, F.; Dressler, R.; Duran, I.; Dzysiuk, N.; Eleftheriadis, C.; Be, F.; Ferrari, A.; Fraval, K.; Ganesan, S.; García, A. R.; Giubrone, Giuseppe; Gómez-Hornillos, M. B.; Gonçalves, I. F.; González-Romero, E.; Gon?alves, I. F.; Griesmayer, E.; Guerrero, C.; Gunsing, F.; Gurusamy, P.; Heinitz, S.; Jenkins, D. G.; Jericha, E.; Kadi, Y.; Käppeler, F.; Karadimos, D.; Kivel, N.; Koehler, P.; Kokkoris, M.; Krtička, M.; Kroll, J.; Langer, C.; Krti?ka, M.; Lederer, C.; Leeb, H.; Leong, L. S.; Lo Meo, S.; Losito, R.; Manousos, A.; Marganiec, J.; Martìnez, T.; Massimi, C.; Mastinu, P. F.; Mart\ńez, T.; Mastromarco, M.; Meaze, M.; Mendoza, E.; Mengoni, A.; Milazzo, P. M.; Mingrone, F.; Mirea, M.; Mondalaers, W.; Paradela, C.; Pavlik, Andreas; Perkowski, J.; Pignatari, M.; Plompen, Arjan; Praena, J.; Quesada, J. M.; Rauscher, Thomas; Reifarth, René; Riegov, A.; Roman, F.; Rubbia, Carlo; Sarmento, Raul; Saxena, A.; Schillebeeckx, Peter; Schmidt, S.; Schumann, D.; Tagliente, G.; Tain, J. L.; Tarrío, D.; D., Tarŕ,́; Tassan-Got, L.; Tsinganis, A.; Valenta, S.; Vannini, G.; Variale, V.; Vaz, P.; Ventura, A.; Versaci, R.; Gomez Hornillos, María Belén; Vermeulen, M. J.; Vlachoudis, V.; Vlastou, R.; Wallner, A.; Ware, T.; Weigand, M.; Weiß, C.; Riego, A.; Wright, T. J.; Mondelaers, Willy

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American Physical Society, Physical Review C, 1(89), 2014

DOI: 10.1103/physrevc.89.014605

EDP Sciences, EPJ Web of Conferences, (93), p. 02009, 2015

DOI: 10.1051/epjconf/20159302009

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Experimental neutron capture data of $^{58}$Ni from the CERN n_TOF facility

Journal article published in 2014 by n_TOF Collaboration, Petar Žugec, P. ?ugec, M. Barbagallo, Nicola Colonna, D. Bosnar, S. Altstadt, J. Andrzejewski, L. Audouin, V. Bécares, F. Be?vá?, F. Bečvář, F. Belloni, E. Berthoumieux, J. Billowes and other authors.

This paper is made freely available by the publisher.

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Abstract

The 58Ni(n, gamma) cross section has been measured at the neutron time of flight facility n_TOF at CERN, in the energy range from thermal up to 300 keV. In the resolved resonance region, extending up to 122 keV neutron energy, 51 resonances could be identified. The Maxwellian averaged cross sections (MACS) have been calculated for thermal values kT = 5 - 100 keV with uncertainties of less than 6%, showing fair agreement with recent experimental and evaluated data for thermal energies up to 40 keV. The MACS extracted in the present work at 30 keV is 34.6 +/- 0.6stat +/- 1.8sys mb, in agreement with latest results and evaluations, but 11% lower relative to compilation of astrophysical interest. When included in models of the s-process nucleosynthesis in massive stars, this change results in a 60% increase of the abundance of this isotope, with a negligible propagation on heavier species. The reason is that using both the old or the new MACS, 58Ni is efficiently depleted by neutron captures. ; JRC.D.4-Standards for Nuclear Safety, Security and Safeguards

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Experimental neutron capture data of $^{58}$Ni from the CERN n_TOF facility

Abstract