Abstract
The process of nuclear de-excitation by evaporation was calculated by using a Monte Carlo method and fast electronic computers. The competition between the emission of neutrons, protons, deuterons, tritons He/sup 3/, and He/ sup 4/ was studied as a functicn, of various parameters and experimental conditions. A systematic survey is presented for a range of atomic numbers, mass numbers and excitation energy of initial nuclei. The nuclides studied extend from A =49 to 239 with Z = Z/sub A/ plus or minus 3. The range of excitation energies for which computations are presented extends from 1OO to 700 Mev. Among the parameters affecting the process the importance of the temperature correction of the Coulomb barrier and the level density parameters are considered in detail. The average properties of the process such as average numbers of the various particles emitted, the average number of nucleons, of charged particles, and of charges emitted are summarized in graphical and tabular form for various combinations of the parameters used in the computation. Energy spectra of the various emitted particles are also shown. (auth)
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