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.

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