Production and propagation of cosmic-ray positrons and Electrons

摘要

We have made a new calculation of the cosmic-ray secondary positron spectrum using a diffusive halo model for Galactic comic-ray propagation. The code computes self-consistently the spectra of primary and secondary nucleons, primary electrons, and secondary positrons and electrons. The models are first adjusted to agree with the observed cosmic-ray boron/carbon ratio, and the interstellar proton and helium spectra are then computed; these spectra are used to obtain the source function for the secondary positrons/electrons that the finally propagated with the same model parameters.