Abstract
Photoneutron emission cross sections were measured for below threshold using quasimonochromatic -ray beams produced in laser Compton scattering at the NewSUBARU synchrotron radiation facility. The data show fine structures in the low-energy tail of the giant-dipole resonance; the integrated strength of the fine structure below 18 MeV is intermediate among the past measurements with bremsstrahlung and the positron annihilation rays. We compare the photoneutron emission data with the talys statistical model calculation implemented with the simple modified Lorentzian model of and strengths. We also compare the total photoabsorption cross sections for with shell model and antisymmetrized molecular dynamics calculations as well as the statistical model calculation. We further investigate the consistency between the present photoneutron emission and the reverse ) cross sections through their corresponding astrophysical rate.
- Received 1 November 2022
- Accepted 8 December 2023
DOI:https://doi.org/10.1103/PhysRevC.109.014617
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