Strong enhancement of electron-ion recombination owing to free-bound and bound-bound resonance transitions

The effect of free-bound and bound-bound resonance nonadiabatic transitions of an electron on electron-ion recombination rates in the plasma of a Ne/Xe and Ar/Xe inert gas mixture has been studied. A kinetic model of recombination has been proposed including energy relaxation in collisions with electrons, resonant electron capture to Rydberg states through three-body collisions of Xe$^+$ ions with Ne or Ar atoms and dissociative recombination of NeXe$^+$ or ArXe$^+$ ions, and $n\to n'$ resonance transitions. It has been shown that effective resonance processes occurring in quasimolecular systems sharply increase both the recombination coefficient and the effect of collisions with neutral particles even at quite high degrees of ionization of the plasma.