Photoneutron emission cross sections were measured for 13C below 2n threshold using quasi-monochromatic γ-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 γ rays. We compare the photoneutron emission data with the {\sf TALYS} statistical model calculation implemented with the simple modified Lorentzian model of E1 and M1 strengths. We also compare the total photoabsorption cross sections for 13C with the 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 12C(n,γ) cross sections through their corresponding astrophysical rate.
@article{arxiv.2303.04194,
title = {Photoneutron emission cross sections for $^{13}$C},
author = {H. Utsunomiya and S. Goriely and M. Kimura and N. Shimizu and Y. Utsuno and G. M. Tveten and T. Renstrøm and T. Ari-izumi and S. Miyamoto},
journal= {arXiv preprint arXiv:2303.04194},
year = {2023}
}