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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. http://resolver.caltech.edu/CaltechAUTHORS:20140703-215730302

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Abstract

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
http://adsabs.harvard.edu/abs/1996SSRv...78..149LADSArticle
http://dx.doi.org/http://link.springer.com/article/10.1007%2FBF00170801DOIArticle
http://link.springer.com/article/10.1007%2FBF00170801PublisherArticle
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
Funders:
Funding AgencyGrant Number
NASANAS5-30704
NASANAGW-1919
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1996-22
Record Number:CaltechAUTHORS:20140703-215730302
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140703-215730302
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46838
Collection:CaltechAUTHORS
Deposited By: Deborah Miles
Deposited On:23 Jul 2014 21:55
Last Modified:23 Jul 2014 21:55

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