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Cosmic ray studies with a gas Cerenkov counter in association with an ionization spectrometerThe results from a balloon-borne gas Cerenkov counter (threshold 16.5 GeV/nuc) and an ionization spectrometer are presented. The gas Cerenkov counter provides an absolute energy calibration for the response of the calorimeter for the Z range of 5-26 nuclei of cosmic rays. The contribution of scintillation to the gas Cerenkov pulse height has been obtained by independently selecting particles below the gas Cerenkov threshold using the ionization spectrometer. Energy spectra were derived by minimizing the chi-squared between a Monte Carlo simulated data and flight data. Best fit power laws were determined for C, N, O, Ne, Mg, and Si. The power laws, all consistent with E exp-2.7, are not good fits to the data. A better fit is obtained using the spectrum derived from the spectrometer.
Document ID
19800060295
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Balasubrahmanyan, V. K.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ormes, J. F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Arens, J. F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Siohan, F.
(NASA Goddard Space Flight Center Laboratory for High Energy Astrophysics, Greenbelt, Md., United States)
Simon, M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Spiegelhauer, H.
(Max-Planck-Institut fuer Extraterrestrische Physik Garching, Germany)
Yodh, G. B.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 10, 2013
Publication Date
August 1, 1980
Publication Information
Publication: Astrophysics and Space Science
Volume: 71
Issue: 1, Au
Subject Category
Space Radiation
Accession Number
80A44465
Funding Number(s)
CONTRACT_GRANT: BMFT-WRK-224
CONTRACT_GRANT: BMFT-WRK-0275/5
Distribution Limits
Public
Copyright
Other

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