Mathematics – Logic
Scientific paper
Dec 1970
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970saosr.330.....m&link_type=abstract
SAO Special Report #330 (1970)
Mathematics
Logic
9
Scientific paper
The production of deuterium, He3, lithium, beryllium, and boron by galactic cosmic rays in the interstellar medium, over the life of the Galaxy, is calculated. When allowance is made for the interchange of material between stars and the interstellar gas and for the change of cosmic-ray intensity with time, the lithium, beryllium, and boron produced turn out to be ample to explain the observed abundances. It is also found that high-energy a-a reactions contribute in an essential way to the observed lithium. Deuterium and He3 are not produced in sufficient amounts. To explain the Li7/Li6 ratio measured terrestrially and in chondritic meteorites, we invoke cosmological production of Li7. This implies the production of deuterium and He3 as well, in amounts consistent with observation. The theory in its present form, however, cannot explain a solar system Li7/Li7 ratio of 12 and stellar ratios as low as 3.
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