Decrease in galactic cosmic ray modulation during the last Ice Age on earth

Details Decrease in galactic cosmic ray modulation during the last Ice Age on earth Decrease in galactic cosmic ray modulation during the last Ice Age on earth

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979geokh.....1189u&link_type=abstract

Geokhimiia, Aug. 1979, p. 1189-1201. In Russian.

Physics

Cosmic Rays, Galactic Radiation, Geochronology, Glaciers, Radiochemistry, Iron Meteorites, Radioactive Isotopes

Scientific paper

From an analysis of experimental data on the radioactivity of the Mn-53 isotope, it is shown that in the past period of 2 to 6 million years, the lunar surface was exposed to galactic cosmic rays with a practically unmodulated spectrum, closely resembling the spectrum recorded at the earth in April-May 1965 or August-December 1976. This indicates that the intensity of unmodulated cosmic rays was constant during the past approximately 6 million years and that there was no effective modulation of galactic cosmic rays in the solar system during a period of 2 to 6 million years that coincides with the last Ice Age.

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