Direct and equilibrium processes in the (p,n) reactions at 22.2+-0.2 MeV proton energy

Neutron spectra in (p,n) reactions on 27Al, 52Cr, 56Fe, sup(58,60)Ni, sup(90,91,94)Zr, 115In, 181Ta, 197Au nuclei are measured at 22.2+-0.2 MeV proton energy at 30 deg, 60 deg, 90 deg, 120 deg and 150 deg angles. Measurements have been carried out on a neutron spectrometer by the time of flight on a 150 cm cyclotron of FEI. Neutron spectra, neutron angular distributions, the dependence of thermodynamic temperature and the dependence of the direct interaction cross section on mass number are presented graphically. Parameters of nuclear level density, cross section of neutron emission, ratio of preequilibrium neutron emission are tabulated. Neutron spectra have been analyzed within the frames of the model of preequilibrium nuclear decay (MPD). Asymmetry of angular distribution at low temperatures is not explained by the MPD. The non-equilibrium part of spectra is practically wholy caused by direct processes, responsible for asymmetry of neutron angular distribution