Experimental constraints on γ-ray strength function of ⁷²Ga from ⁷²\mathrmGa(n,γ)⁷²Ga capture data and reevaluation of Maxwellian-averaged cross sections of ⁷¹Ga

2025/12/02 by Ali, Sajid, Rajkumar Santra, Santra, Rajkumar +2
Physics and Astronomy · Engineering · Materials Science · #Nuclear physics research studies #Nuclear reactor physics and engineering #Radiation Shielding Materials Analysis

paper · pdf · doi:10.48550/arxiv.2512.02736

Abstract

The γ-ray strength function of medium-mass neutron rich nuclei ⁷²Ga has been extracted from the statistical Hauser-Feshbach analysis of the available capture data of ⁷¹Ga(n,γ)⁷²Ga over the 0.01 - 3 MeV energy range with the required nuclear level density (NLD) of the ⁷²Ga constraint from the work of R. Santra et al.,[\hrefhttps://doi.org/10.1103/PhysRevC.107.064611Physical Review C 107, 064611 (2023)]. The Gogny D1M model for the E1 and M1 strength functions, including low-energy upbends of ⁷²Ga nuclei, is experimentally constrained in the present work. Subsequently, the Maxwellian-averaged cross section(MACS) of ⁷¹Ga has been reevaluated based on the present γ-ray strength function. It is found that the present MACS value at \(kT = 30\) keV is 115.35^+11.92_-10.44 mb, which is consistent with previous work.

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