Angular distributions of fast neutrons from the reaction

The angular distributions of neutrons from the reaction Co⁵⁹ (p, n) for 4 values of the proton energyE_p=5.23–4.05 MeV have been measured. The preliminary analysis of the results shows that in the reaction mechanism a certain role is played also by a direct process, most probably of a knock-out type, the relative contribution to the reaction yield of which decreases with decreasing value ofE_p.The authors would like to thank Prof. V. Petrílka for his constant interest in the work, the staff of the Cyclotron Laboratory of the Nuclear Research Institute of the Czechoslovak Academy of Sciences for their cooperation and the group of physicists of the Nuclear Reactions Department of the institute for lending most of the apparatus.