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Elemental Abundances of Cosmic Rays with Z > 33 as Measured on HEAO-3

Newport, B. J. and Stone, E. C. and Waddington, C. J. and Binns, W. R. and Garrard, T. L. and Israel, M. H. and Klarmann, J. (1985) Elemental Abundances of Cosmic Rays with Z > 33 as Measured on HEAO-3. In: Proceedings of the 19th International Cosmic Ray Conference. Vol.2. Goddard Space Flight Center , Green Belt, MD, pp. 123-126.

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The Heavy Nuclei Experiment on (HEAO-3) high energy astronomy observatory 3 uses a combination of ion chambers and a Cerenkov counter. During analysis, each particle is assigned two parameters, Zc and Zi, proportional to the square roots of the Cerenkov and mean ionization signals respectively. Because the ionization signal is double valued, a unique assignment of particle charge, Z, is not possible in general. Previous work was limited to particles of either high rigidity or low energy, for which a unique charge assignment was possible, although those subsets contain less than 50% of the total number of particles observed. The maximum likelihood technique was used to determine abundances for the complete data set from approx. 1.5 to approx. 80 GeV/amu.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Stone, E. C.0000-0002-2010-5462
Binns, W. R.0000-0001-6110-3407
Israel, M. H.0000-0002-8104-208X
Additional Information:© NASA/STI. Provided by the NASA Astrophysics Data System. We thank B.W. Gauld for assistance in programming for data analysis. This work was supported in part by NASA grants NAG 8-498, 500, 502 and NGR 05-002-160, 24-005-050, 26-008-001.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
NASANGR 05-002-160
NASANGR 24-005-050
NASANGR 26-008-001
Non-Subject Keywords:Abundance, Cerenkov Radiation, Cosmic Rays, Galactic Radiation, Heavy Nuclei, Cerenkov Counters, Heao 3, Ionization Chambers, Maximum Likelihood Estimates, Resolution
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1985-16
Record Number:CaltechAUTHORS:20140501-144334411
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45444
Deposited By: Joy Painter
Deposited On:01 May 2014 21:59
Last Modified:09 Mar 2020 13:18

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