2019/06/30 by H. Utsunomiya, T. Renstrøm, G. M. Tveten +9
Physics and Astronomy · #nucl-ex
paper · pdf · doi:10.1103/physrevc.100.034605
published as Phys. Rev. C 100, 034605 (2019) · arXiv admin note: substantial text overlap with arXiv:1811.00291, arXiv:1804.07654
arxiv created 2019/08/26 · arxiv updated 2019/09/11
Photoneutron cross sections were measured for 137Ba and 138Ba at energies below two-neutron threshold using quasi-monochromatic γ-ray beams produced in laser Compton-scattering at the NewSUBARU synchrotron radiation facility. The photoneutron data are used to constrain the γ-ray strength function on the basis of the Hartree-Fock-Bogolyubov plus quasi-particle random phase approximation using the Gogny D1M interaction. Supplementing the experimentally constrained γ-ray strength function with the zero-limit E1 and M1 contributions which are unique to the deexcitation mode, we discuss radiative neutron capture cross sections relevant to the s-process nucleosynthesis of barium isotopes in the vicinity of the neutron magic number 82.