Cosmic ray intensity over long time scales

Details Cosmic ray intensity over long time scales Cosmic ray intensity over long time scales

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979rvgsp..17..552f&link_type=abstract

Reviews of Geophysics and Space Physics, vol. 17, June 1979, p. 552-560.

Astronomy and Astrophysics

Astrophysics

4

Cosmic Rays, Incident Radiation, Long Term Effects, Secular Variations, Astrophysics, Earth Atmosphere, Lunar Surface, Meteoritic Composition, Supernovae

Scientific paper

Possible sources of long-term cosmic ray variations outside the region of solar modulation are discussed: (1) variations in distant sources (strength, composition, and spectra); (2) variations in propagation conditions in the Galaxy; (3) variations in the position of the solar system with respect to the spatial distribution of cosmic rays in the Galaxy; and (4) rare local events. As most meteorites are relatively small objects, centimeters to meters in diameter, they are ideal target material for galactic cosmic rays which have a range of the order of a meter. Considering the moon as a target, it is noted that nuclides in lunar rocks give a sample of cosmic rays flux at random times in the past. Works on production of nuclides by cosmic rays in the atmosphere are also described.

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