Physics
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phr...227...27m&link_type=abstract
Physics Reports, Volume 227, Issue 1-5, p. 27-35.
Physics
1
Scientific paper
Studies of inhomogeneous primordial nucleosynthesis are once again generating some excitement. Rather than some new theoretical innovation, however, this new excitement arises from recent optical observations which indicate the presence of a relatively high Be abundance in the early galaxy. Although such observations are consistent with the predictions of simple inhomogeneous models, recent more sophisticated models predict Be yields which are orders of magnitude below detectable levels. We discuss here some of the caveats associated with Be production in the early universe, and argue that primordial Be yields consistent with recent observations remain a viable option. Since detectable yields of B (observable in the UV with the Hubble Space Telescope) are also predicted by inhomogeneous nucleosynthesis, primordial production of this isotope is also considered. The production of Be and B isotopes by GCR spallation is discussed, and we highlight possible means of discriminating between this more traditional mechanism and that of primordial production. We conclude that an observation of Be/B > 0.1 in the early galaxy would be a ``smoking gun'' of inhomogeneous big bang nucleosynthesis.
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