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Energy spectra of cosmic-ray nuclei to above 100 GeV per nucleonEnergy spectra of cosmic-ray nuclei boron to iron have been measured from 2 GeV per nucleon to beyond 100 GeV per nucleon. The data were obtained using an ionization calorimeter flown on a balloon from Palestine, Texas. The 3450 kg payload floated at 7 g/sq cm for almost 24 hours. The results are in excellent agreement with those of other workers where overlaps exist. The spectra are not consistent with single power laws, and demonstrate the power of using a single technique sensitive over a large dynamic range. The data are consistent with the leaky box model of cosmic-ray propagation. The boron data indicate that the cosmic-ray escape length decreases with increasing energy as E to the -(0.4 + or - 0.1) up to 100 GeV per nucleon. Secondary nuclei from iron are also consistent with this dependence. Predicted changes in the energy dependence of the ratios of primary nuclei O/C and (Fe + Ni)/(C + O) are also observed.
Document ID
19800066224
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Simon, M.
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Spiegelhauer, H.
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Schmidt, W. K. H.
(Max-Planck-Institut fuer extraterrestrische Physik Garching, Germany)
Siohan, F.
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Ormes, J. F.
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Balasubrahmanyan, V. K.
(Max-Planck-Inst. fuer Extraterrestrische Physik Garching, Germany)
Arens, J. F.
(NASA Goddard Space Flight Center Greenbelt, Md., United States)
Date Acquired
August 10, 2013
Publication Date
July 15, 1980
Publication Information
Publication: Astrophysical Journal
Subject Category
Space Radiation
Accession Number
80A50394
Funding Number(s)
CONTRACT_GRANT: BMFT-WRK-275-5
CONTRACT_GRANT: BMFT-WRK-244
Distribution Limits
Public
Copyright
Other

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