Neutron cross-section and kerma value calculations for C, N, O, Mg, Al, P, S, Ar and Ca from 20 to 50 MeV (radiotherapy dosimetry application)

Publisher Website
Google Scholar
Abstract
The strategy employed involves optical model fitting of experimental total cross-sections to produce elastic and nonelastic cross sections. The nonelastic cross-section is then used to normalise the individual reaction cross-sections produced by GNASH, which is a multistep Hauser-Feshbach model code with a precompound correction for binary channels. The effects of the direct reaction excitation of low-lying levels, particularly in the (n,n') reaction, for C, N and O are considered. The calculated charged particle emission spectra for C, N and O are compared with other experimental results at 27.4, 39.7 and 60.7 MeV neutron energy. The kerma values derived are compared with previous work, using a continuum evaporation model, and with other tabulations.