Computer Science
Scientific paper
Jan 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975rspta.277..395l&link_type=abstract
(Royal Society, Discussion on the Origin of the Cosmic Radiation, London, England, Feb. 20, 21, 1974.) Royal Society (London), P
Computer Science
4
Cosmic Rays, Cosmology, Energy Spectra, Heavy Nuclei, Long Term Effects, Proton Flux Density, Alpha Particles, Charged Particles, Particle Flux Density, Periodic Variations, Radioactive Age Determination, Solar Cosmic Rays, Spatial Distribution
Scientific paper
The present-day information on the temporal and spatial variations in the flux and chemical composition of cosmic-ray protons and multicharged nuclei during certain intervals of time, since the beginning of the solar system, is discussed. This information has been deduced on the basis of analyses of isotopic changes and alterations in the crystalline matrix of meteoritic and lunar materials. Most of the samples analyzed were exposed to cosmic radiation during the recent time period, 0-10 Ma B.P. and some during 100-1000 Ma B.P. Limited data are also available for the time period soon after the formation of solid objects in the solar system, i.e., ca. 4500 Ma B.P., based on analyses of certain meteorites. The cosmic-ray parameters deduced are for the 1-3 AU space and are average values for time periods of 100,000 to 10,000,000 a for protons, alpha-particles, v.h./v.v.h. nuclei in the kinetic energy interval (1-1500) MeV/nucleon.
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