Analysis of the A2Πi ~ X2Σ+ perturbations of the AlO radical

Abstract

The A2Πi ~ X2Σ+ perturbations of the AlO radical were analyzed in the mixed levels of (νA, νX) = (0, 5), (1, 6), (2, 7), (3, 8), and (4, 9) by a simultaneous analysis of the reported D2Σ+–A2Πi transition wave numbers and the A2Πi–X2Σ+ energy level differences, the latter being evaluated by taking the differences of the reported wave numbers of the C2Πr–X2Σ+ and C2Πr–A2Πi transitions. The molecular constants for A2Πi, ν = 0–4; D2Σ+, ν = 0–5; and X2Σ+, ν = 8 and 9, and the perturbation constants were determined. The Rydberg–Klein–Rees (RKR) potentials of the A2Πi and D2Σ+ states were obtained using these molecular constants. The spin-orbit constants, Aν, for A2Πi are discussed in terms of the electronic structure of the A2Πi state.