We describe a new non-LTE average-atom-kinetics model of plasmas in which the two-electron transitions of autoionization and its inverse, resonant capture, play a dominant role in establishing ionization and energy balance. We show that, compared with a familiar collisional-radiative-equilibrium model for laser-produced gold plasmas: (1) the two-electron transitions force recombination of the plasma with decreasing density, and (2) the two-electron transitions nevertheless further act to greatly increase the radiative emissivity of the plasma.
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Albritton et al. (1999) studied this question.
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