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The elemental and isotopic composition of galactic cosmic ray nucleiA 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.
Document ID
19830057065
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Mewaldt, R. A.
(California Institute of Technology Pasadena, PA, United States)
Date Acquired
August 11, 2013
Publication Date
March 1, 1983
Publication Information
ISSN: 0034-6853
Subject Category
Space Radiation
Accession Number
83A38283
Funding Number(s)
CONTRACT_GRANT: NGR-05-002-160
CONTRACT_GRANT: NAS5-20721
Distribution Limits
Public
Copyright
Other

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