Laser-induced fluorescence from low-lyingΣandΠstates of the HgZn excimer

Laser spectroscopy of the HgCd exciplex

“…We believe this to be the CO+ (Hg 6 'SD+Cd 5 'P, ) state which, as may be seen in Fig. largest factor contributing to the uncertainty in the measured wavelengths of the vibrational components, particularly those associated with large v' or v" quantum numbers. The wave-number separation Av between the corresponding vibrationa1 components of two isotopic molecules is given by bv=(1 p)u-'hG +i&& -(1 p)u -"b, G -+i&2 1, exhibits an avoided crossing with the 80+ state that causes it to be somewhat shallower than the analogous CO+ state in HgZn [15].Although the D 1 state appears in the same general energy region of the PE diagram, there was no evidence of another state being excited by the probe radiation from the reservoir states. The CO+ state corresponds approximately to the 'X (Hg 6 'S +Cd 5'P ) state in Hund's case (a), which has a large moment for dipole transitions to the ground state [8].…”