POPULATION INVERSION IN OPTICALLY THICK, RECOMBINING HYDROGEN PLASMAS
Furukane,U., Yokota,T., Kawasaki,K.: 1983, J.Quant.Spectros.Radiat.
Transfer, 29, 75.
The plasma condition is investigated theoretically for population inversion
between the first two excited states of hydrogen atoms in a recombining plasma.
The rate equations, including atom-atom collision terms, is solved consistently
with the optical escape factors. The upper bound of the ground level population
density (n1)max necessary for inversion in the optically thick plasma at
specified electron density and temperature is nearly inversely proportional
to the mean radius of the plasma r0. With a decrease in the atom temperature,
the upper bounds increase in the optically thin plasma but decrease in the
optically thick plasma.
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