Calculation of spectroscopic constants and radiative parameters for the A1Σ+–X1Σ+ electronic transitions of the CsLi and CsRb molecules

Abstract

Vibrational, rotational, and centrifugal spectroscopic constants; radiative parameters (the Einstein coefficients for spontaneous emission, the oscillator strengths for absorption, and the Franck–Condon factors), the r_v′v″-centroids; the wavenumbers of rotational lines of rovibronic transitions in the systems of bands A¹Σ⁺–X¹Σ⁺ of CsLi (0 ≤ v′ ≤ 25, 0 ≤ v″ ≤ 51, j = 0, 30, 50, 70, 100) and CsRb (0 ≤ v′ ≤ 30, 0 ≤ v″ ≤ 64, j = 0, 50, 100) molecules; and the radiative lifetimes for excited electronic states are calculated. The calculations are carried out on the basis of semiempirical potential curves constructed in this work. The calculated spectroscopic constants are compared with the experimental data. The lifetimes have been obtained for the first time.