THE ROLE OF SINGLE-STEP IONIZATION BY THERMAL ELECTRON-ATOM COLLISIONS G. V. Golubkov, N. M. Kuznetsov et V.V. YegorovJ. Phys. Colloques, 40 C7 (1979) C7-89-C7-90DOI: https://doi.org/10.1051/jphyscol:1979744