Abstract
We apply state-resolved molecular kinetics to study the chemical evolution of the primordial Universe. In particular, the vibrationally resolved kinetics of the most abundant molecular species, H2 and its cation H 2 + , is calculated by solving a master equation. The results show that the vibrational level populations of these two species are not in local thermal equilibrium for a wide range of redshifts. We discuss possible effects of such non-equilibrium distributions on the cosmic background radiation.
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