Monte Carlo Calculations of Nuclear Evaporation Processes. V. Emission of Particles Heavier ThanHe4

Previous Monte Carlo calculations of nuclear evaporation reactions have been extended to include the emission of ${\mathrm{He}}^6$, ${\mathrm{Li}}^6$, ${\mathrm{Li}}^7$, ${\mathrm{Li}}^8$, and ${\mathrm{Be}}^7$ from Cu, Ag, Au, and Bi targets bombarded with high-energy protons (340-2000 Mev). Comparison with available experimental results shows good agreement in most cases. A discrepancy has been observed between the calculated and observed variation of ${\mathrm{Be}}^7$ formation cross section with the mass of the target nucleus, but even here the agreement is within a factor of three. It is shown that, for the usually chosen parameters of the calculation, a level density parameter of $a=\frac{A}{10}$ is necessary.