THEME MUSIC
"Facade", Sir William Walton, 1921
Secondary Antiprotons in Galactic Cosmic Radiation
By Stephen Rosen
ABSTRACT
CALCULATIONS ARE PRESENTED of the production of secondary antiprotons due to inelastic collisions of high-energy primary cosmic rays with interstellar gas nuclei. Cosmic-ray diffusion theory is assumed to apply in the steady-state approximation, with a constant average beam intensity taken over space. The cosmic-ray energy spectrum, production thresholds, cosmic-ray, and target abundances and densities, and production and annihilation cross-sections are examined and utilized. The results give a very approximate energy spectrum for the antiproton flux. Astrophysical ramifications of this collision source of antiprotons are discussed in light of the dominance of leakage over annihilation as a mechanism of antiproton loss.
Received 4 November 1966
DOI:https://doi.org/10.1103/PhysRev.158.1227
©1967 American Physical Society
Secondary Antiprotons in Galactic Cosmic Radiation
By Stephen Rosen
ABSTRACT
CALCULATIONS ARE PRESENTED of the production of secondary antiprotons due to inelastic collisions of high-energy primary cosmic rays with interstellar gas nuclei. Cosmic-ray diffusion theory is assumed to apply in the steady-state approximation, with a constant average beam intensity taken over space. The cosmic-ray energy spectrum, production thresholds, cosmic-ray, and target abundances and densities, and production and annihilation cross-sections are examined and utilized. The results give a very approximate energy spectrum for the antiproton flux. Astrophysical ramifications of this collision source of antiprotons are discussed in light of the dominance of leakage over annihilation as a mechanism of antiproton loss.
Received 4 November 1966
DOI:https://doi.org/10.1103/PhysRev.158.1227
©1967 American Physical Society
