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γ-ray strength function for barium isotopes
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DOI：10.1103/PhysRevC.100.034605.png)
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Abstract
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Photoneutron cross sections were measured for Ba-137 and Ba-138 at energies below two-neutron threshold using quasimonochromatic gamma-ray beams produced in laser Compton scattering at the NewSUBARU synchrotron radiation facility. The photoneutron data are used to constrain the gamma-ray strength function on the basis of the Hartree-Fock-Bogolyubov plus quasiparticle random phase approximation using the Gogny D1M interaction. Supplementing the experimentally constrained gamma-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.
Keywords:
PHOTONEUTRON CROSS-SECTIONS
NEUTRON-CAPTURE
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