Computer Science
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aipc..264..205k&link_type=abstract
In: Particle acceleration in cosmic plasmas; Proceedings of the Workshop, Bartol Research Inst., Newark, DE, Dec. 4-6, 1991 (A93
Computer Science
1
Beryllium 10, Carbon 14, Earth Atmosphere, Galactic Cosmic Rays, Supernova Remnants, Atmospheric Composition, Thermoluminescence
Scientific paper
Consideration is given to very recent experimental data on cosmogenic Be-10 and C-14 isotope abundance in natural archives. It is shown that the new data confirm the conclusion on a cosmic ray intensity increase in the solar system due to SNE about 35,000 yr ago. It is argued that there is no doubt as to the existence of a Be-10 peak at about 35,000 y B.P. in ice cores. There is a synchronization of Southern and Northern Hemisphere ice core records for the considered peak. Available radiocarbon records in stalagmites, baked clay, and corals, obtained independently using different experimental methods, show that atmospheric C-14 abundance continuously increased in time to the past with a maximum around 35,000 y B.P. by a factor of 2 in comparison with present-day values.
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