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Composition of cosmic-ray nuclei from boron to nickel for 1200 to 2400 MeV per nucleonBalloon-borne measurements of cosmic-ray nuclear abundances for Z = 5-28 and energies 1.2-1.4 GeV/nucleon, obtained using the scintillation/Cerenkov-counter telescope and multiwire proportional counter described by Dwyer et al. (1984) on four flights from Texas and Oklahoma during 1973-1975, are reported. The data are presented in tables and graphs and compared with published observations. Charge separation (sigma = 0.2 units for Fe) and exposure factor (38 sq m sr h) are attained, and the findings are found to be in good agreement with the predictions of a simple leaky-box model of the Galaxy and a pure exponential path-length distribution, although a nested-leaky-box model with some truncation is possible. The delay between e-process nucleosynthesis and cosmic-ray acceleration is estimated on the basis of the Co abundance at greater than 100 d and probably greater than 100,000 yr.
Document ID
19850061579
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Dwyer, R.
(Chicago Univ. Chicago, IL, United States)
Meyer, P.
(Chicago, University IL, United States)
Date Acquired
August 12, 2013
Publication Date
July 15, 1985
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 294
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
85A43730
Funding Number(s)
CONTRACT_GRANT: NGL-14-001-005
Distribution Limits
Public
Copyright
Other

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