Interaction of ultra-high energy cosmic rays with microwave background radiation

Details Interaction of ultra-high energy cosmic rays with microwave background radiation Interaction of ultra-high energy cosmic rays with microwave background radiation

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.167...93a&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 167, no. 1, May 1990, p. 93-110.

Astronomy and Astrophysics

Astrophysics

16

Background Radiation, Cosmic Rays, High Energy Interactions, Microwave Spectra, Intergalactic Media, Mesons, Photoproduction

Scientific paper

The formation of the 'bump' and the 'black-body cutoff' in the cosmic-ray (CR) spectrum arising from the pi-meson photoproduction reaction in collisions of UHE CR protons with the microwave background radiation (MBR) is studied. A kinetic equation which describes CR proton propagation in the MBR taking account of the catastrophic nature of the pi-meson photoproduction process is derived. The equilibrium CR proton spectrum obtained from the solution of the stationary kinetic equation is in general agreement with the spectrum obtained assuming continuous energy loss approximation. However, the spectra from point sources noticeably differ from those obtained in the continuous loss approximation.

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