Monte Carlo Calculations of Nuclear Evaporation Processes. V. Emission of Particles Heavier Than He⁴

Previous Monte Carlo calculations of nuclear evaporation reactions have been extended to include the emission of He⁶, Li⁶, Li⁷, Li⁸, and Be⁷ 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 Be⁷ 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=A/10 is necessary.