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Cosmic ray production rates of Be-10 and Al-26 in quartz from glacially polished rocksThe concentrations of Be-10 and Al-26 in quartz crystals extracted from glacially polished granitic surfaces from the Sierra Nevada range are studied. These surfaces are identified with the glacial advance during the Tioga period about 11,000 yr ago. The measurements yield the most accurate estimates to date for the absolute production rates of three nuclides in SiO2 due to cosmic ray nucleons and muons for geomagnetic latitudes 43.8-44.6 N and altitudes 2.1-3.6 km.
Document ID
19900033520
Document Type
Reprint (Version printed in journal)
Authors
Nishiizumi, K. (California Univ. La Jolla, CA, United States)
Kohl, C. P. (California Univ. La Jolla, CA, United States)
Winterer, E. L. (California, University La Jolla, United States)
Klein, J. (California Univ. La Jolla, CA, United States)
Middleton, R. (Pennsylvania, University Philadelphia, United States)
Date Acquired
August 14, 2013
Publication Date
December 10, 1989
Publication Information
Publication: Journal of Geophysical Research
Volume: 94
ISSN: 0148-0227
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF PHY-85-16304
CONTRACT_GRANT: NSF EAR-86-17994
CONTRACT_GRANT: NAG9-33
Distribution Limits
Public
Copyright
Other