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Record Details

Record 88 of 5880
High resolution measurements of galactic cosmic-ray neon, magnesium, and silicon isotopes
External Online Source: doi:10.1086/183166
Author and Affiliation:
Mewaldt, R. A.(California Inst. of Tech., Pasadena, CA, United States)
Spalding, J. D.(California Inst. of Tech., Pasadena, CA, United States)
Stone, E. C.(California Inst. of Tech., Pasadena, CA, United States)
Vogt, R. E.(California Institute of Technology, Pasadena, Calif., United States)
Abstract: High-resolution measurements of the abundances of individual isotopes of neon, magnesium and silicon in galactic cosmic rays are reported. The Caltech Heavy Isotope Spectrometer Telescope on board the ISEE 3 spacecraft was used to obtain measurements in the range 30 to 180 MeV/n at an rms mass resolution of 0.20 amu. Results indicate excesses of Ne-22 as well as Mg-25 and Mg-26 in galactic cosmic rays with respect to their solar system abundances. Calculations of the effects of interstellar propagation and solar modulation on cosmic-ray isotope abundances also imply an Mg-25 + Mg-26 cosmic ray source fraction significantly greater than the solar system fraction, and it is suggested that the cosmic ray source material and solar system material were synthesized under different conditions.
Publication Date: Jan 15, 1980
Document ID:
19800039283
(Acquired Nov 30, 1995)
Accession Number: 80A23453
Subject Category: SPACE RADIATION
Document Type: Journal Article
Publication Information: Astrophysical Journal; p. vol. 235
Publisher Information: United States
Contract/Grant/Task Num: NAS5-20721; NGR-05-002-160
Financial Sponsor: NASA; United States
Organization Source: California Inst. of Tech.; Pasadena, CA, United States
Description: 5p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ABUNDANCE; COSMIC RAYS; GALACTIC RADIATION; MAGNESIUM ISOTOPES; NEON ISOTOPES; SILICON ISOTOPES; INTERNATIONAL SUN EARTH EXPLORER 3; SOLAR SYSTEM; SPACEBORNE ASTRONOMY
Imprint And Other Notes: Astrophysical Journal, Part 2 - Letters to the Editor, vol. 235, Jan. 15, 1980, p. L95-L99.
Miscellaneous Notes: Jan. 15, 1980, p. L95-L99
Availability Source: Other Sources
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