Neutron inelastic scattering of 232 Th: measurements and beyond
Résumé
Gamma production cross sections have been obtained for 81 transitions in 232 Th from (n,n'γ), 11 in 231 Th from (n,2nγ) and 7 in 230 Th from (n,3nγ) reactions using prompt gamma spectroscopy. Incident neutron energies were determined using the neutron time-of-flight technique. Sources of uncertainty have been examined and their correlations have been computed. Total uncertainty on cross sections ranges from 4 to 20%. Obtained cross sections are in agreement with prior experiments, but are not well reproduced by the TALYS-1.8 reaction code using default parameters. During analysis, discrepancies between our findings and the Evaluated Nuclear Structure Data File (ENSDF) were noted. Future work related to the present experiment includes: improving theoretical models, quantifying the influence of the 232 Th inelastic neutron cross section on reactor core parameters, and conducting additional measurements.
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