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Cosmic ray studies with a gas Cherenkov counter in association with an ionization spectrometerThe results from a balloon-borne gas Cherenkov counter (threshold 16.5 GeV/nucleon) and an ionization spectrometer are presented. The gas Cherenkov counter provides an absolute energy distribution for the response of the calorimeter for 5 or = Z 26 nuclei of cosmic rays. The contribution of scintillation to the gas Cherenkov pulse height was obtained by independently selecting particles below the gas Cherenkov threshold using the ionization spectrometer. Energy spectra were derived by minimizing the chi squared between Monte Carlo simulted data and flight data. Best fit power laws, dN/dE = AE-gamma, were determined for C, N, O, Ne, Mg, and Si. The power laws, all consistent with E (-2.7) are not good fits to the data. A better fit is obtained using the spectrum derived from the spectrometer. The data from the ionization calorimeter and the gas Cherenkov are thus completely self-consistent.
Document ID
19800014757
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
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 Greenbelt, MD, United States)
Yodh, G. B. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Simon, M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Spiegelhauer, H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1980
Subject Category
Space Radiation
Report/Patent Number
NASA-TM-80639
Accession Number
80N23246
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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