The interaction between excited and ground state rare gas atoms. II. Homonuclear excimers with spin-orbit coupling

Abstract

A model of potential is proposed to describe the potential curves of the first excited states of rare gas homonuclear excimers [X(np6, 1So)-X(np5(n + 1)s, 1.3P)]. The model is composed of three terms: the long range part of the interaction given by a partial summation of the multipole series, the short range term which is the exchange Fermi potential, and the core-core interaction deduced from the ion-atom asymptotic model of Duman and Smirnov. The spin-orbit coupling is added using the semiempirical method of Cohen and Schneider. Three adjustable parameters are introduced to obtain the best value of the Ou+(3P1) and of the Ou+(1P1) potential well. Comparison with ab initio potential curves is made, and also with experimental data for the Ne*2, Ar*2, Kr*2 and Xe*2 excimers. © 1980 American Institute of Physics.