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

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$\pi$ BaF${}_2$ array DANCE. The (n,$\gamma$) 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.

11 pages, 13 pages

References in corpus (2)

• Neutron Reactions in Astrophysics
• Neutron capture cross section of unstable 63Ni: implications for stellar nucleosynthesis

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• The Status and Future of Direct Nuclear Reaction Measurements for Stellar Burning
• First experimental constraint on the ${}^{191}$Os$(n,\gamma )$ reaction rate relevant to $s$-process nucleosynthesis
• Stellar ${\beta }^{-}$-decay rate of ${}^{63}$Ni and its impact on the $s$-process nucleosynthesis in massive stars