Potential energy curves for the B11u state and short-range part of the X10g+ state of Cd2 determined from excitation and dispersed fluorescence spectra recorded using the B11u↔X10g+ transition

Laser-induced fluorescence excitation and dispersed fluorescence spectra of a cadmium dimer recorded using the B11u↔X10+g transition are reported. In the excitation, well-resolved isotopic structure of several υ'←υ"=0 vibrational components (υ' from 34 to 40) as well as a free←bound unstructured band was recorded. The B11u-state interatomic potential was derived using the ‘inverse-perturbation’ fitting method. In the dispersed fluorescence after selective excitation of the B-state υ'=39 level of the 226Cd2 molecular isotopic component, a Condon internal diffraction pattern was recorded and simulated, confirming the υ-assignment. Analysis of the dispersed fluorescence spectrum yielded information on the repulsive branch of the ground-state potential. The experimental results were compared with results of ab initio calculations as well as with experimental results of earlier studies.