An explanation of the secondary-to-primary ratio in galactic cosmic radiation - No contradiction with continuous Fermi acceleration

Details An explanation of the secondary-to-primary ratio in galactic cosmic radiation - No contradiction with continuous Fermi acceleration An explanation of the secondary-to-primary ratio in galactic cosmic radiation - No contradiction with continuous Fermi acceleration

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...151..408l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 151, no. 2, Oct. 1985, p. 408-420.

Astronomy and Astrophysics

Astrophysics

22

Galactic Cosmic Rays, Particle Acceleration, Primary Cosmic Rays, Secondary Cosmic Rays, Interstellar Matter, Particle Diffusion

Scientific paper

The secondary-to-primary ratio in galactic cosmic radiation at relativistic momenta is calculated. The primaries are assumed to be accelerated continuously from the thermal galactic background medium by 1st and 2nd order Fermi acceleration, whereas secondaries result from fragmentation of primaries. It is shown that the measured decrease with momentum of this ratio does not exclude the possibility that cosmic rays are accelerated in the interstellar medium as a whole. This contradicts the previous conjecture of Hayakawa (1969), Cowsik (1980), and Eichler (1980). As demonstrated, their claimed logarithmically increasing ratio is a sole consequence of the assumed equality of the secondaries and primaries reciprocal sum of fragmentation and escape lifetime in the interstellar medium. Once a momentum dependence of the escape lifetimes, as demanded by the microscopic physics, is allowed, the measured decreasing secondary/primary ratio is explained, because, at the same momentum per nucleon, the absolute value of the secondary lifetime is smaller than the primary lifetime.

Affiliated with

Also associated with

No associations

Rating

An explanation of the secondary-to-primary ratio in galactic cosmic radiation - No contradiction with continuous Fermi acceleration does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with An explanation of the secondary-to-primary ratio in galactic cosmic radiation - No contradiction with continuous Fermi acceleration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An explanation of the secondary-to-primary ratio in galactic cosmic radiation - No contradiction with continuous Fermi acceleration will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1545242