Spectral and Time-Resolved Studies of Green Cs₂Fluorescence

Abstract

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 nrn range. The identified fluorescence line progressions are attributed to the E'(3) 1Пu → X 1 ∑ + g t r a n s i t i o n . A n e x t e n s i o n of the attractive branch of the E'(3) 1 II. potential towards longer internuclear 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 potentiał. The lifetime values are measured. The multicomponent fluorescence decays are interpreted as evidence of perturbations of the V(3) VП. state by a number of bound and repulsive states of dicherent symmetry. The predissociation rates are estimated.