학술논문
Nuclear Level Density and $\gamma$-ray Strength Function of $^{67}\mathrm{Ni}$ and the impact on the i-process
Document Type
Working Paper
Author
Ingeberg, V. W.; Siem, S.; Wiedeking, M.; Choplin, A.; Goriely, S.; Siess, L.; Abrahams, K. J.; Arnswald, K.; Garrote, F. Bello; Bleuel, D. L.; Cederkäll, J.; Christoffersen, T. L.; Cox, D. M.; De Witte, H.; Gaffney, L. P.; Görgen, A.; Henrich, C.; Illana, A.; Jones, P.; Kheswa, B. V.; Kröll, T.; Majola, S. N. T.; Malatji, K. L.; Ojala, J.; Pakarinen, J.; Rainovski, G.; Reiter, P.; von Schmid, M.; Seidlitz, M.; Tveten, G. M.; Warr, N.; Zeiser, F.
Source
Subject
Language
Abstract
Proton-$\gamma$ coincidences from $(\mathrm{d},\mathrm{p})$ reactions between a $^{66}\mathrm{Ni}$ beam and a deuterated polyethylene target have been analyzed with the inverse Oslo method to find the nuclear level density (NLD) and $\gamma$-ray strength function ($\gamma$SF) of $^{67}\mathrm{Ni}$. The $^{66}\mathrm{Ni}(\mathrm{n},\gamma)$ capture cross section has been calculated using the Hauser-Feshbach model in TALYS using the measured NLD and $\gamma$SF as constraints. We confirm that $^{66}\mathrm{Ni}(\mathrm{n},\gamma)$ acts as a bottleneck when relying on one-zone nucleosynthesis calculations. However, we find that the impact of this reaction is strongly damped in multi-zone low-metallicity AGB stellar models experiencing i-process nucleosynthesis.
Comment: Submitted to Phys. Rev. C
Comment: Submitted to Phys. Rev. C