Constraining the cross section of <sup>82</sup>Se(n, γ)<sup>83</sup>Se to validate the β-Oslo method
ORAL
Abstract
Neutron star mergers have recently been confirmed as one of the sites of the rapid neutron-capture process (r-process). In order to better understand the r-process, nuclear physics properties of the nuclei involved are needed, including neutron-capture cross sections. However, many r-process nuclei are not viable for direct measurements of neutron-capture rates, so their neutron-capture cross sections are poorly known. This has led to the development of indirect measurement techniques such as the β-Oslo method. This method will be validated with the 82Se(n,γ)83Se reaction, where the neutron-capture product, 83Se, can be accessed through the β-decay of 83As, which has been studied at the National Superconducting Cyclotron Laboratory with the Summing NaI (SuN) total absorption spectrometer. The nuclear level density (NLD) and γ-ray strength function (γSF) of 83Se have been extracted using the β-Oslo method and fed into a statistical Hauser-Feshbach model to obtain a neutron-capture cross section. The comparison of this constrained neutron-capture cross section to a direct measurement of the neutron capture on 82Se using the Detector for Advanced Neutron Capture Experiments (DANCE) at Los Alamos National Laboratory will be presented.
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Presenters
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Katherine L L Childers
- Michigan State Univ
- National Superconducting Cyclotron Laboratory