Double differential neutron emission cross sections for n+(230,231,232,233,234) Th reactions

摘要

Consistent calculation and analysis of neutron-induced reaction cross sections of Th-232 with optical model, the unified Hauser-Feshbach and exciton model, the linear angular momentum dependent exciton density model, the coupled channel theory and the distorted wave Born approximation is carried out in the E-n <= 20 MeV energy range based on the experimental data of total, nonelastic, fission, and other reaction cross section and elastic scattering angular distributions. Especially, the analysis includes the elastic and inelastic scattering angular distribution, the inelastic scattering cross sections of discrete levels, the prompt fission neutron spectra, the double differential cross section and the angle-integrated spectra for neutron emission. Theoretical calculations are compared with recent experimental data, other theoretical calculations and evaluated data from ENDF/B6 and JENDL-3. Theoretical models predict the results for n + Th-230,Th-231,Th-233,Th-234 reactions. (c) 2005 Elsevier B.V. All rights reserved.