Cosmic ray nucleosynthesis in the early galaxy

Details Cosmic ray nucleosynthesis in the early galaxy Cosmic ray nucleosynthesis in the early galaxy

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phr...227..243s&link_type=abstract

Physics Reports, Volume 227, Issue 1-5, p. 243-249.

Physics

1

Scientific paper

Cosmic ray spallation/fusion reactions may yield astrophysically interesting amounts of lithium, beryllium and boron during the early evolution of the Galaxy. In particular, since α, α fusion reactions can produce 6Li and 7Li whereas Be and B require CNO nuclei as spallation targets, the Pop II ratios of Li to Be and/or B are vastly different from their Pop I counterparts. Current data on Pop II Be do not exclude the possibility that significant amounts of lithium have been produced via this mechanism. The observed increase in the Pop II abundance of beryllium with increasing metallicity points to synthesis during the early Galaxy. The boron to beryllium ratio is relatively insensitive to model-dependent, evolutionary uncertainties and could provide a signature for cosmic ray nucleosynthesis during the early Galaxy.

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