부산대학교 도서관

The neutron capture cross sections (n,γγ6679,81kT=307981) of bromine were obtained using the time-of-flight technique at the Back-n facility of the China Spallation Neutron Source. Prompt n,γγ6679,81kT=307981-rays originating from neutron-induced capture events were detected using four Cn,γγ6679,81kT=307981Dn,γγ6679,81kT=307981 detectors. The pulse-height weighting technique and double-bunch unfolding method based on Bayesian theory were used in the data analysis. Background deductions, normalization, and corrections were carefully considered to obtain reliable measurement results. The multilevel R-matrix Bayesian code SAMMY was used to extract the resonance parameters in the resolved resonance region (RRR). The average cross sections in the unresolved resonance region (URR) were obtained from 10 to 400 keV. The experimental results were compared with data from several evaluated libraries and previous experiments in the RRR and URR. The TALYS code was used to describe the average cross sections in the URR. The astrophysical Maxwell average cross sections (MACSs) of n,γγ6679,81kT=307981Br from kT = 5 to 100 keV were calculated over a sufficiently wide range of neutron energies. At a thermal energy of n,γγ6679,81kT=307981 keV, the MACS value for n,γγ6679,81kT=307981Br 682±68 mb was in good agreement with the KADoNiS v1.0 recommended value. By contrast, the value of 293±29 mb for n,γγ6679,81kT=307981Br was substantially higher than that of the evaluated database and the KADoNiS v1.0 recommended value.