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The Isotopic Composition of Anomalous Cosmic Rays from SAMPEX

Leske, R. A. and Mewaldt, R. A. and Cummings, A. C. and Cummings, J. R. and Stone, E. C. and von Rosenvinge, T. T. (1996) The Isotopic Composition of Anomalous Cosmic Rays from SAMPEX. Space Science Reviews, 78 (1-2). pp. 149-154. ISSN 0038-6308. doi:10.1007/BF00170801.

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Measurements of the anomalous cosmic ray (ACR) isotopic composition have been made in three regions of the magnetosphere accessible from the polar Earth orbit of SAMPEX, including the interplanetary medium at high latitudes and geomagnetically trapped ACRs. At those latitudes where ACRs can penetrate the Earth's magnetic field while fully stripped galactic cosmic rays (GCRs) of similar energies are excluded, a pure ACR sample is observed to have the following composition: ^(15)N/N < 0.023, ^(18)O/^(16)O < 0.0034, and ^(22)Ne/^(20)Ne = 0.077(+0.085, -0.023). We compare our values with those found by previous investigators and with those measured in other samples of solar and galactic material. In particular, a comparison of ^(22)Ne/^(20)Ne measurements from various sources implies that GCRs are not simply an accelerated sample of the local interstellar medium.

Item Type:Article
Related URLs:
URLURL TypeDescription ItemConference Paper
Leske, R. A.0000-0002-0156-2414
Mewaldt, R. A.0000-0003-2178-9111
Cummings, A. C.0000-0002-3840-7696
Stone, E. C.0000-0002-2010-5462
Additional Information:© 1996 Springer. We appreciate contributions by R. S. Selesnick. This work was supported by NASA under contract NAS5-30704 and grant NAGW-1919.
Group:Space Radiation Laboratory
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1996-22
Issue or Number:1-2
Record Number:CaltechAUTHORS:20140703-215730302
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46838
Deposited By: Deborah Miles
Deposited On:23 Jul 2014 21:55
Last Modified:10 Nov 2021 17:29

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