Cosmic ray and solar proton albedo neutron decay injection

Probabilities for injecting protons into the radiation belts for large regions of B-L space by cosmic ray albedo neutron decay, Crand, and by solar proton albedo neutron decay, Spand, are computed. A computer program simulates the ejection of neutrons from the atmosphere of the earth. The computations are compared with both directional and omnidirectional experimental data. The trapped radiation belt protons with energies 20 Mev can be explained by Crand injection and atmospheric losses only if the correct ratios of the albedo neutron fluxes to the mean atmospheric densities encountered by trapped protons are a factor of 50 larger than the values used in this paper. The trapped proton flux from Spand injection is evaluated using the currently estimated solar proton flux and found to be small compared with Crand injection. Below 20 Mev, in many regions of space, there are too many protons to be accounted for by either Crand or Spand injection, and some other source is required.