Preequilibrium emission in differential cross-section calculations

Nuclear reaction data are needed for many applications to determine the production of neutron and gamma radiation. The present upper limit of evaluated data libraries is about 20 MeV. At incident energies above 10 MeV, preequilibrium emission of nucleons has to be considered because it gives a non-negligible contribution at the higher end of the emission spectra. To get the required information, we tested and updated the program Alice, which calculates differential cross-sections with the hybrid model of Blann, and we implemented the systematics of continuum angular distributions by Kalbach. For (n, n), (p, n) and (d, n) reactions, comparisons of the calculational results with published experimental data show satisfying agreement. (orig./HP)