Production and Propagation of Particles with A>81 in the Galaxy

Details Production and Propagation of Particles with A>81 in the Galaxy Production and Propagation of Particles with A>81 in the Galaxy

Jan 1972

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972phrvd...5..307k&link_type=abstract

Physical Review D, vol. 5, Issue 2, pp. 307-313

Physics

2

Scientific paper

A detailed mathematical model is developed to describe the transformation of the charge composition of superheavy (A>81) cosmic rays by spallation on interstellar hydrogen in the galaxy. If one takes a single source which suddenly injects particles with an r-process charge spectrum t0 years in the past, the calculated relative abundance ratios in four atomic mass groups are consistent with measured values for t0~2.5×105 years. We further conclude that for any initial source distribution the upper limit on t0 is 106 years.

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