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The Isotopic Composition of Anomalous and Galactic Cosmic Rays from SAMPEX

Leske, R. A. and Cummings, A. C. and Cummings, J. R. and Mewaldt, R. A. and Stone, E. C. and von Rosenvinge, T. T. (1995) The Isotopic Composition of Anomalous and Galactic Cosmic Rays from SAMPEX. In: Proceedings of the 24th International Cosmic Ray Conference. Vol.2. International Union of Pure and Applied Physics , pp. 606-609.

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New measurements of the anomalous cosmic ray (ACR) isotopic composition are presented, using data from the Mass Spectrometer Telescope (MAST) on SAMPEX. At high invariant latitudes or in interplanetary space, ACR isotopic composition measurements require correction for contamination from galactic cosmic rays (GCRs); however, at lower latitudes singly-charged ACRs can penetrate the Earth's magnetic field while fully stripped GCRs of similar energies are excluded, allowing us to study a pure ACR sample. Preliminary values for ACRs obtained using this geomagnetic filter approach are: ^(15)N /N < 0.032, ^(18)0/^(16)0 < 0.0057, and ^(22)Ne = ^(20)Ne = 0.087(+0.137, -0.026). We compare our values with those found by previous investigators and with those measured in other samples of solar and galactic material.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Leske, R. A.0000-0002-0156-2414
Cummings, A. C.0000-0002-3840-7696
Mewaldt, R. A.0000-0003-2178-9111
Stone, E. C.0000-0002-2010-5462
von Rosenvinge, T. T.0000-0001-7320-4141
Additional Information:© IUPAP. Provided by the NASA Astrophysics Data System. This work was supported by NASA under contract NAS5-30704 and grant NAGW-1919.
Group:Space Radiation Laboratory
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Space Radiation Laboratory1995-15
Record Number:CaltechAUTHORS:20140616-161605497
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ID Code:46286
Deposited By: Deborah Miles
Deposited On:18 Jun 2014 02:15
Last Modified:28 Nov 2022 23:41

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