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.
@article{arxiv.1906.06334,
title = {$\gamma$-ray Strength Function for Barium Isotopes},
author = {H. Utsunomiya and T. Renstrøm and G. M. Tveten and S. Goriely and T. Ari-izumi and V. W. Ingeberg and B. V. Kheswa and Y. -W. Lui and S. Miyamoto and S. Hilaire and S. Péru and A. J. Koning},
journal= {arXiv preprint arXiv:1906.06334},
year = {2019}
}
Comments
arXiv admin note: substantial text overlap with arXiv:1811.00291, arXiv:1804.07654