Photoneutron cross sections for Ni isotopes: Toward understanding $(n,\gamma)$ cross sections relevant to the weak s-process nucleosynthesis
Abstract
Photoneutron cross sections were measured for Ni, Ni, Ni, and Ni at energies between the one-neutron and two-neutron thresholds using quasi-monochromatic -ray beams produced in laser Compton-scattering at the NewSUBARU synchrotron radiation facility. The new photoneutron data are used to extract the -ray strength function above the neutron threshold complementing the information obtained by the Oslo method below the threshold. We discuss radiative neutron capture cross sections and the Maxwellian-averaged cross sections for Ni isotopes including Ni, a branching point nucleus along the weak s-process path. The cross sections are calculated with the experimentally constrained -ray strength functions from the Hartree-Fock-Bogolyubov plus quasi-particle-random phase approximation based on the Gogny D1M interaction for both and components and supplemented with the upbend.
Keywords
Cite
@article{arxiv.1804.08312,
title = {Photoneutron cross sections for Ni isotopes: Toward understanding $(n,\gamma)$ cross sections relevant to the weak s-process nucleosynthesis},
author = {H. Utsunomiya and T. Renstrøm and G. M. Tveten and S. Goriely and S. Katayama and T. Ari-izumi and D. Takenaka and D. Symochko and B. V. Kheswa and V. W. Ingeberg and T. Glodariu and Y. -W. Lui and S. Miyamoto and A. C. Larsen and J. E. Midtbø and A. Görgen and S. Siem and L. Crespo Campo and M. Guttormsen and S. Hilaire and S. Péru and A. J. Koning},
journal= {arXiv preprint arXiv:1804.08312},
year = {2018}
}
Comments
9 pages, 7 figures, re-submitted to PRC