Measurements of 160Dy (p, γ) at Energies Relevant for the Astrophysical γ Process

Rare information on photodisintegration reactions of nuclei with mass numbers $A \approx 160$ at astrophysical conditions impedes our understanding the origin $p$-nuclei. Experimental determination key ($p,\gamma$) cross sections has been playing an important role to verify nuclear reaction models and provide rates relevant ($\gamma,p$) in $\gamma$-process. In this paper we report first section measurements $^{160}$Dy($p,\gamma$)$^{161}$Ho $^{161}$Dy($p,n$)$^{161}$Ho beam energy range 3.4 - 7.0 MeV, partially covering Gamow window. Such determinations are possible by using two targets various isotopic fractions. The data can put a strong constraint level densities gamma strength functions for \approx$ 160 Hauser-Feshbach statistical model. Furthermore, find best parameters TALYS that reproduce A $\thicksim$ available, $^{162}$Er($p,\gamma$)$^{163}$Tm, recommend constrained $^{161}$Ho($\gamma,p$)$^{160}$Dy over wide temperature $\gamma$-process network calculations. Although determined $^{161}$Ho($\gamma$, p) stellar 1 2 GK differ up one order magnitude from NON-SMOKER predictions, it minor effect yields $^{160}$Dy accordingly $p$-nuclei, $^{156,158}$Dy. sensitivity study confirms $^{160}$Dy($p$, $\gamma$)$^{161}$Ho is measured precisely enough predict $p$-nuclei