Explanation of the secondary to primary ratio within the continuous Fermi accelerator model

Details Explanation of the secondary to primary ratio within the continuous Fermi accelerator model Explanation of the secondary to primary ratio within the continuous Fermi accelerator model

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....3..226l&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 3 p 226-229 (SEE N85-34862 23-93)

Physics

Nuclear Physics

Galactic Radiation, Mathematical Models, Ratios, Secondary Cosmic Rays, Spatial Distribution, Interstellar Matter, Interstellar Radiation, Life (Durability), Momentum, Nuclei (Nuclear Physics)

Scientific paper

The secondary to primary ratio in galactic cosmic radiation at relativistic momenta is calculated in a model, where the primaries are continuously accelerated from the thermal galactic background medium by 1st and 2nd order Fermi acceleration. It is shown that the measured decrease with momentum does not exclude that cosmic rays are accelerated in the interstellar medium as a whole. Once a momentum dependence of the mean lifetime and the different spatial source distributions are adequately taken into account, the measured decreasing ratio can be explained.

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