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The cosmic ray proton and helium spectra above 50 GeVThe primary cosmic ray proton and He spectra from 50 GeV to 2000 GeV have been measured by an ionization spectrometer flown on a balloon. At low energies, the energies of individual events are determined to within + or - 30%. At higher energies, the cascade is not fully contained within the four mean free path thick spectrometer and the problems of estimating the energies of these events are discussed. The proton spectrum continued with constant exponent = -2.7 + or - 0.1 up to energies greater than 1000 GeV. This spectrum was in agreement with the results at the low energies. There was no evidence for a spectral break at about 1000 GeV observed.
Document ID
19720004070
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ryan, M. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Balasubrahmanyan, V. K. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ormes, J. F. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 6, 2013
Publication Date
November 1, 1971
Publication Information
Publication: Goddard Space Flight Center Contrib. to the Twelfth Intern. Conf. on Cosmic Rays
Subject Category
Space Radiation
Accession Number
72N11719
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

IDRelationTitle19720004069Collected WorksGoddard Space Flight Center Contributions to the Twelfth International Conference on Cosmic Rays
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