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Emulsion chamber observations of primary cosmic-ray electrons in the energy range 30-1000 GeVThe results of a series of emulsion exposures, beginning in Japan in 1968 and continued in the U.S. since 1975, which have yielded a total balloon-altitude exposure of 98,700 sq m sr s, are presented. The data are discussed in terms of several models of cosmic-ray propagation. Interpreted in terms of the energy-dependent leaky-box model, the spectrum results suggest a galactic electron residence time of 1.0(+2.0, -0.5) x 10 to the 7th yr, which is consistent with results from Be-10 observations. Finally, the possibility that departures from smooth power law behavior in the spectrum due to individual nearby sources will be observable in the energy range above 1 TeV is discussed.
Document ID
19800056500
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Nishimura, J.
(Tokyo Univ. Japan)
Fujii, M.
(Tokyo, University Tokyo, Japan)
Taira, T.
(Kanagawa University Yokohama, Japan)
Aizu, E.
(Tokyo Univ. Japan)
Hiraiwa, H.
(Kanagawa Prefectural College Japan)
Kobayashi, T.
(Aoyama-Gakuin University Tokyo, Japan)
Niu, K.
(Nagoya University Nagoya, Japan)
Ohta, I.
(Utsunomiya University Utsunomiya, Japan)
Golden, R. L.
(New Mexico State University Las Cruces, N. Mex., United States)
Koss, T. A.
(Washington, University Seattle, Wash., United States)
Date Acquired
August 10, 2013
Publication Date
May 15, 1980
Publication Information
Publication: Astrophysical Journal
Subject Category
Space Radiation
Accession Number
80A40670
Distribution Limits
Public
Copyright
Other

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