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arXiv · 1512.02263

The $^{63}$Ni(n,$γ$) cross section measured with DANCE

M. Weigand·T. A. Bredeweg·A. Couture·K. Göbel·T. Heftrich·M. Jandel·F. Käppeler·C. Lederer·N. Kivel·G. Korschinek·M. Krticka·J. M. O'Donnell·J. Ostermöller·R. Plag·R. Reifarth·D. Schumann·J. L. Ullmann·A. Wallner
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Abstract

The neutron capture cross section of the s-process branch nucleus $^{63}$Ni affects the abundances of other nuclei in its region, especially $^{63}$Cu and $^{64}$Zn. In order to determine the energy dependent neutron capture cross section in the astrophysical energy region, an experiment at the Los Alamos National Laboratory has been performed using the calorimetric 4$π$ BaF$_2$ array DANCE. The (n,$γ$) cross section of $^{63}$Ni has been determined relative to the well known $^{197}$Au standard with uncertainties below 15%. Various $^{63}$Ni resonances have been identified based on the Q-value. Furthermore, the s-process sensitivity of the new values was analyzed with the new network calculation tool NETZ.

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M. Weigand, T. A. Bredeweg, A. Couture, K. Göbel, T. Heftrich, M. Jandel, F. Käppeler, C. Lederer, N. Kivel, G. Korschinek, M. Krticka, J. M. O'Donnell, J. Ostermöller, R. Plag, R. Reifarth, D. Schumann, J. L. Ullmann, A. Wallner. 2015-12-07. The $^{63}$Ni(n,$γ$) cross section measured with DANCE. https://doi.org/10.1103/physrevc.92.045810

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