Neutron inelastic scattering off 232Th: measurements and beyond

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.