Electron-Stimulated Transitions in the 2p~53s Configuration of the Ne Atom

摘要

An experiment on electron heating in a decaying helium-neon plasma by a longitudinal electric field was used to measure a set of rate constants for electron-stimulated transitions between the 3s levels of the Ne atom. This set adequately describes the kinetics of populations of ~3P_2, ~3P_1, and ~3P_0 states in the range of electron temperatures T_3 = 0.03-1.2 eV and has the form k_(21) - (2.77 ± 0.15) * 10~(-7) exp(-Δ_(21)/T_e)(0.03/T_e), k_(20) = (8.2 ± 4) * 10~(-9) exp(-Δ_(20)/T_e), and k_(10) = (3.1 ± 0.7) * 10~(-8) exp(-Δ_(21)/T_) cm~3/s, where Δ_(ij) are the thresholds of the processes. Moreover, the rate constant for "mixing" of 3s levels in the channel of stepwise excitation of the 2p~53p system with subsequent radiative 3p → 3s transitions is determined: k_(sps) = (2.1 ± 1) exp(-1.7/T_e) * 10~(-8) cm~3/s. The comparison of the values obtained for the rate constants suggests that the transitions without a change of total momentum of an atomic residue have the highest probability.