Cosmic-ray Clocks

Details Cosmic-ray Clocks Cosmic-ray Clocks

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ssrv...86..225p&link_type=abstract

Space Science Reviews, v. 86, Issue 1/4, p. 225-238 (1998).

Physics

6

Scientific paper

Secondary radioactive isotopes that are used for the determination of cosmic-ray age have relatively short decay lifetimes. The measured abundance of these isotopes at low energies is representative of the cosmic-ray diffusion and the gas distribution in a region of a few hundred parsecs around the Sun. We show how to determine the local cosmic-ray diffusion coefficient in the Galaxy using the data on decaying cosmic-ray nuclei. Calculated surviving fractions of decaying secondary isotopes in diffusion and leaky box models are presented.

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