Intensity Distribution of the 31P¬11S+ Band System of NaLi

Abstract

In the framework of adiabatic approximation we perform numerical calculations of intensity distribution for the 3¹P¬1¹S⁺ band system of NaLi based on the Franck-Condon (FC) principle. In addition, the internuclear distances at which the most favorable transitions occurred are predicted.  Comparing the calculated FC factors and the corresponding spectral lines observed recently reveals a good agreement, particularly, at node of envelop of the FC factors. Some local deviations in spectral intensity between the calculated results and experimental data indicate local perturbations in the 3¹P state. This result requires further investigations in details.