SPECTRAL AND TIME-RESOLVED STUDIES OF GREEN CS2 FLUORESCENCE

The origin and dynamic properties of the green fluorescence of Cs2 excited by laser lines in the 457-488 nm range are studied. Emphasis is placed on the analysis of the 501-527 nm range. The identified fluorescence line progressions are attributed to the E'(3) 1PI(u) --> X1SIGMA(g)+ transition. An extension of the attractive branch of the E'(3) 1PI(u) potential towards longer inter-nuclear distances is reconstructed by the semi-classical method. A narrow feature at 522 nm is found to be connected with a minimum of the difference potential. The lifetime values are measured. The multicomponent fluorescence decays are interpreted as evidence of perturbations of the E'(3) 1PI(u) state by a number of bound and repulsive states of different symmetry. The predissociation rates are estimated.