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Astrophysical Li-7 as a product of big bang nucleosynthesis and galactic cosmic-ray spallationThe astrophysical Li-7 abundance is considered to be largely primordial, while the Be and B abundances are thought to be due to galactic cosmic ray (GCR) spallation reactions on top of a much smaller big bang component. But GCR spallation should also produce Li-7. As a consistency check on the combination of big bang nucleosynthesis and GCR spallation, the Be and B data from a sample of hot population II stars is used to subtract from the measured Li-7 abundance an estimate of the amount generated by GCR spallation for each star in the sample, and then to add to this baseline an estimate of the metallicity-dependent augmentation of Li-7 due to spallation. The singly reduced primordial Li-7 abundance is still consistent with big bang nucleosynthesis, and a single GCR spallation model can fit the Be, B, and corrected Li-7 abundances for all the stars in the sample.
Document ID
19930034847
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Olive, Keith A.
(Minnesota Univ. Minneapolis, United States)
Schramm, David N.
(Chicago Univ. IL, United States)
Date Acquired
August 15, 2013
Publication Date
December 3, 1992
Publication Information
Publication: Nature
Volume: 360
Issue: 6403
ISSN: 0028-0836
Subject Category
Astrophysics
Accession Number
93A18844
Distribution Limits
Public
Copyright
Other

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