Charged particle evaporation from compound nuclei formed by bombardment of58Ni with 70 MeV16O ions part I

Highly excited compound nuclei of⁷⁴Kr have been formed by bombardment of⁵⁸Ni with 70 MeV¹⁶O ions. The spectra of protons and -particles resulting from the decay of the compound nucleus (and several daughter nuclei) have been recorded at laboratory angles from 30° to 155°. The CM differential cross sections corresponding to definite energies for the particles emitted were calculated from the data. The charged particle spectra and the angular distributions show that evaporation processes are dominant. A study of spectral shapes and angular distributions has to some extent made it possible to distinguish primary particles from those evaporated after the emission of one or several particles.On leave fromFaculty of Mathematics and Physics, Charles University, Prague, Czechoslovakia.