Experimental investigation of electronic states of LiCs dissociating to Li(22S) and Cs(52D) atoms

Abstract

Polarization labeling spectroscopy technique was used to measure excitation spectra of LiCs molecule in the spectral range of 16 000-18 500 cm -1. Four band systems were observed and assigned to transitions from the ground X1Σ+ state to excited states (4) = 0 +, (5)Ω = 0+, (5)Ω = 1, and (6)Ω = 1 (in Hunds case (c) notation proper here), the latter three states being fine structure components of the states d3Π and e3Σ +, nominally of triplet symmetry. The observed states are characterized spectroscopically and the experimental results are compared with predictions of theoretical calculations, showing accuracy of the theoretical electronic term values better than 100 cm-1 and of the ωe and Re constants within 5%. © 2011 American Institute of Physics.