The transition dipole moment function of the chlorine E0(g)(+)(P-3(2))-B-3Pi 0(u)(+) system

Specific rovibrational levels of the E0(g)(+) ion-pair state of Cl-2 have b een laser excited by optical-optical double resonance (OODR) via the B0(u)( +) state. A two-color, single-laser visible+ultraviolet (VIS + UV) scheme w as used, where the UV radiation was derived by second-harmonic generation f rom the VIS laser output. Spectrally resolved emission at 240-265 nm was ob served. The E0(g)(+) --> BOu+ spectra exhibited both discrete and continuou s (Condon oscillation) parts, from which the E --> B electronic transition moment curve M-e(R) was derived. It is compared with corresponding results on ion-pair states of I-2. (C) 1998 American Institute of Physics. [S0021-9 606(98)00648-5].