Analytical calculation of secondary nucleons double-differential distributions in interactions of intermediate energies nucleons with nuclei

An analytical method for calculation of secondary nucleons double-differential distributions based on the solution of kinetic equations in the case of small angular approximation is presented. Comparison of the results obtained for the double-differential cross-sections with experimental data on the interaction of incoming 200 MeV protons with 12C nuclei is made. The importance of the quantum effects for the correct assessment of quasi-free component of the nucleon-nucleus interaction cross-section is shown on the basis of this comparison. 2 figs., 14 refs