Quantitative Nuclear Evaporation Theory. II. Proton Evaporation

The transmission of protons into an infinitely absorbing Eckart-Bethe diffuse-nuclear-potential well has been calculated exactly as a function of nuclear size, proton energy, and angular momentum. The transmission varies by an order of magnitude from that computed by others in the critical energy range where the peak of the evaporated proton spectrum occurs. The computed transmission is used to calculate the spectra of protons emitted from excited nuclei and the reaction cross sections for ($p, \mathrm{pn}$), ($p, 2n$), and ($p, 2p$) processes. The fit with experimental data is excellent.