Deuteronomy and Numbers
David N. Schramm, Michael S. Turner
Abstract
Four light isotopes - D, 3He, 4He and 7Li - were produced by nuclear reactions a few seconds after the big bang. New measurements of 3He in the ISM by Gloeckler and Geiss and of deuterium in high redshift hydrogen clouds by Tytler and his collaborators provide further confirmation of big-bang nucleosynthesis and new insight about the density of ordinary matter (baryons).
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