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The abundance of the radioactive isotope Al-26 in galactic cosmic raysSatellite observations of the isotopic composition of aluminum in low energy cosmic rays (E/M = 200 MeV/amu) have been used to determine the abundance of the unstable isotope Al-26 (T1/2 = 0.87 Myr). The observed abundance ratio, Al-26/Al-27 = 0.036 (+0.037, -0.022), is in good agreement with previous balloon observations and yields a cosmic ray confinement time consistent with values based on the abundance of Be-10.
Document ID
19850040838
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wiedenbeck, M. E.
(Chicago, University Chicago, IL; California, University, Berkeley, CA, United States)
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
85A22989
Funding Number(s)
CONTRACT_GRANT: NAG5-308
CONTRACT_GRANT: NAS5-20995
Distribution Limits
Public
Copyright
Other

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