User manual for THRES-F code

Experimental cross-section data for neutron-induced reactions in the energy range 0-20 MeV are often incomplete or non-existent. The code described in the present manual permits the approximate calculation of the cross-sections of all the energetically possible neutron-induced reactions (except radiative capture) coupling the statistical-model theory with systematics formulae and available experimental data. Pointwise and group cross-sections for energies up to 20 MeV can be determined with only Z and A required as description of the target nucleus. (author)