Irreversible decay of hydrogen excited states can accelerate primordial plasma recombination in comparison with the standard scenario (Peebles, 1968; Seager et al., 1999).

The rates of uncompensated radiative transitions from excited states to the ground state of hydrogen in cosmological plasma are calculated in the frame of the standard cosmological model. The calculations show that the rates of uncompensated transitions to the ground state due to two-quantum decay of excited ns and nd states are negligible in comparison with the rates of uncompensated transitions np -> 1s concerned with escape of Lyman-quanta from the line profiles because of cosmological redshift.

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Page created on November 24, 2005, updated on December 30, 2005.