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Composition and spectra of primary cosmic-ray electrons and nuclei above 10 GeVRecent experiments have extended the knowledge of the flux and energy spectra of individual cosmic-ray components to much higher energies than had previously been accessible. Both electron and nuclear components show a behavior at high energy which is unexpected, and which carries information regarding the sources and the propagation of particles between sources and observer. Electromagnetic interactions which are suffered by the electrons in interstellar space should steepen their spectrum, a steepening that would reveal the average lifetime a cosmic-ray particle spends in the galaxy. Measurements up to 1000 GeV show no such steepening. It was discovered that the composition of the nuclear species which is now measured up to 100 GeV/nucleon changes with energy. This change indicates traversal of less interstellar matter by the high energy particles than by those of lower energy.-
Document ID
19750036489
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Meyer, P.
(Chicago, University Chicago, Ill., United States)
Date Acquired
August 8, 2013
Publication Date
January 23, 1975
Subject Category
Space Radiation
Accession Number
75A20561
Funding Number(s)
CONTRACT_GRANT: NGL-14-001-005
Distribution Limits
Public
Copyright
Other

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