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The shocking development of lithium (and boron) in supernovaeIt is shown that significant amounts of Li-7 and B-11 are produced in Type 2 supernovae. The synthesis of these rare elements occurs as the supernova shock traverses the base of the hydrogen envelope burning He-3 to masses 7 and 11 via alpha capture. The yields in this process are sufficient to account for the difference in lithium abundance observed between Pop 2 and Pop 1 stars. Since lithium (and boron) would, in this manner, be created in the same stars that produce the bulk of the heavy elements, the lithium abundance even in old Pop 1 stars would be high (as observed). The B-11 production may remedy the long-standing problem of the traditional spallation scenario to account for the observed isotopic ratio of boron. Observational consequences of this mechanism are discussed, including the evolution of lithium and boron isotope ratios in the Galaxy and the possible use of the boron yields to constrain the number of blue progenitor Type 2 supernovae.
Document ID
19900030588
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Dearborn, David S. P.
(Lawrence Livermore National Laboratory Livermore, CA, United States)
Schramm, David N.
(NASAFermilab Astrophysics Center Batavia; Chicago, University, IL, United States)
Steigman, Gary
(Ohio State University Columbus, United States)
Truran, James
(Illinois, University Urbana, United States)
Date Acquired
August 14, 2013
Publication Date
December 1, 1989
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 347
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
90A17643
Funding Number(s)
CONTRACT_GRANT: NSF AST-85-15447
CONTRACT_GRANT: NAGW-1321
Distribution Limits
Public
Copyright
Other

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