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Al-26 depth profile in Apollo 15 drill coreAccelerator mass spectrometry is used in a study of galactic cosmic ray production profiles based on cosmic ray-produced Al-26 in the Apollo 15 long core. The results, which are in general agreement with earlier nondestructive counting data, are of significantly higher precision, yet systematically lower. The half-attenuation length for Al-26 production is presently calculated to be 122 g/sq cm, after normalizing the data to average chemical composition.
Document ID
19850034201
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1016/0012-821X(84)90002-5
Authors
Nishiizumi, K. (California Univ. La Jolla, CA, United States)
Arnold, J. R. (California, University La Jolla, CA, United States)
Klein, J. (California Univ. La Jolla, CA, United States)
Middleton, R. (Pennsylvania, University Philadelphia, PA, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1984
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 70
Issue: 2 c
ISSN: 0012-821X
Subject Category
Lunar And Planetary Exploration
Accession Number
85A16352
Funding Number(s)
CONTRACT_GRANT: NGL-05-009-148
Distribution Limits
Public
Copyright
Other

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