Free←bound and bound←bound profiles in excitation spectra of the B31(53P1)←X10+(51S0) transition in CdNg (Ng=noble gas) complexes

Excitation spectra of CdNe, CdAr and CdKr complexes were recorded using the B31(53P1)←X10+(51S0) bound←bound and free←bound transitions. Simulation of dissociation continua formed by the free←bound transitions in CdNe and CdAr permitted determination of the B31-state potential repulsive part above the dissociation limit. The bound←bound transitions in the excitation spectra of CdNe, CdAr and CdKr, and those recorded previously in CdHe and CdXe, were analysed including their rotational structure and isotopic composition providing improved spectroscopical characterization. For all CdNg (Ng=noble gas), Morse functions [for CdHe also Lennard-Jones(6-12)] and ab-initio calculated interatomic potentials were tested as a representation of the B31-state potential below and above the dissociation limit. It was found that for CdNe, CdAr, CdKr and CdXe modified previously reported ab initio calculated potentials may be used. Simulation of the (υ′;υ″)=(2;0)-band rotational profile in CdAr allowed determination of the B31-state rotational constants. Results were compared with those available from previous studies.