Electron-Vibrational Energy Exchange in Collisions of Ar Atomsin the 3P2 Metastable State with N_2(X~lΣ_g~+)Molecules

摘要

Rate constants for electron-vibrational energy exchange Ar(3P,) + N_2,(X~1Σ_g~+, v = 0) →Ar(IS0) + N_2(C~Π_u, v'), wherev =0, 1, 2, were calculated. Calculations were performed taking into account the presence of a resonance in electron scattering by N2(X~1Σ_g~+). As a result, the interaction of Ar(3P,) withN~2(X~1Σ_g~+,v= 0) was characterized by attraction and, in the end, intersection of electron-vibrational potential surfaces correlating with Ar(3P2) + N_2(X~1Σ_g~+,v=0) and Ar('S0) + N,(C~3Π_u,at interparticle distances of2.5-3.5 A. Exchange interaction at which electron-vibrational transitions in the region of intersection ofelectron-vibrational potential surfaces accompanied by spin exchange were induced was calculated by theasymptotic method. The rate constants determined at 300-600 K were on the order of 10-11—and weakly increased as the temperature grew Mainly the C3Π_u, v = 0 state of the N, molecule was popu-lated. The calculation results were in satisfactory agreement with the experimental data obtained at 300 K.