The path-length distribution for galactic cosmic-ray propagation - an energy-dependent depletion of short path lengths

Details The path-length distribution for galactic cosmic-ray propagation - an energy-dependent depletion of short path lengths The path-length distribution for galactic cosmic-ray propagation - an energy-dependent depletion of short path lengths

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...280l..13g&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 280, May 1, 1984, p. L13-L17. Research supported by

Astronomy and Astrophysics

Astrophysics

20

Galactic Cosmic Rays, Interstellar Matter, Particle Energy, Particle Trajectories, Astronomical Models, Particle Interactions, Particle Motion

Scientific paper

It is shown that at low energies, the depletion of short path lengths in the interstellar cosmic-ray path-length distribution is a function of energy, decreasing in magnitude with increasing energy. The analysis leading to this conclusion is based on the comparison of compiled data for the B/C and sub-Fe/Fe ratios at 0.08-50 GeV per nucleon, with the results of detailed galactic propagation and solar modulation calculations, which include experimental values for the important nuclear cross sections. This energy dependence of the depletion resolves some of the conflicts between previous reports on the question of short path lengths and may be explained by models including a matter distribution around discrete sources or, possibly, by models invoking waves generated by particle-magnetic field interactions in the Galaxy.

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