Physics – Nuclear Physics
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983rvgsp..21..295m&link_type=abstract
(International Union of Geodesy and Geophysics, General Assembly, 18th, Hamburg, West Germany, Aug. 15-27, 1983) Reviews of Geop
Physics
Nuclear Physics
18
Chemical Composition, Cosmic Rays, Galactic Radiation, Nuclei (Nuclear Physics), Abundance, Actinide Series, Anomalies, Heavy Nuclei, Solar System
Scientific paper
A directly accessible sample of matter which originates outside the solar system is provided by galactic cosmic rays. The present investigation is primarily concerned with progress related to questions raised regarding the similarity or difference between solar system matter and matter coming from outside the solar system. The investigation takes into account U.S. contributions to this topic over the period from 1979 to 1982. The cosmic ray (CR) abundances of all the elements from H to Ni (atomic number Z=1 to 28) have now been measured. Cosmic ray source (CRS) and solar system (SS) elemental compositions are listed in a table, and the ratio of CRS to SS abundance for 21 elements is shown in a graph. There is now clear evidence from CR isotope studies that the nucleosynthesis of CRS material has differed from that of SS material.
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