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A large area experiment to determine cosmic ray isotopic abundancesMeasurements of the isotopic composition of cosmic rays have shown that the cosmic ray isotope ratios, Ne-22/Ne-20 and (Mg-25 + Mg-26)/Mg-24, exceed the solar abundance ratios by factors of 2.7 and 1.8, respectively. There are several processes which could be responsible for the observed excess of neutron-rich isotopes. The considered models imply neutron enrichment in the case of other, less abundant species, and a measurement of the involved isotopic abundances could provide a basis for the determination of the dominating processes occurring in cosmic ray sources. However, an experiment utilizing special equipment is necessary to conduct the required measurements. Such an experiment, the Aluminum Isotopic Composition Experiment (Alice), is being designed in a joint effort involving NASA and a West German university. Alice uses a Cherenkov-range technique to determine the isotopic composition of elements from oxygen through argon.
Document ID
19850040802
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mauger, B. G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Balasubrahmanyan, V. K.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ormes, J. F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Streitmatter, R. E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Heinrich, W.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Simon, M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Tittel, H. O.
(Siegen, Universitaet-Gesamthochschule Siegen, Germany)
Date Acquired
August 12, 2013
Publication Date
January 1, 1983
Subject Category
Space Radiation
Meeting Information
Meeting: International Cosmic Ray Conference
Location: Bangalore
Country: India
Start Date: August 22, 1983
End Date: September 3, 1983
Accession Number
85A22953
Distribution Limits
Public
Copyright
Other

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