Fluorescence and excitation spectra of the DO+, E1, and G1 states of the HgZn exciplex

Abstract The high-lying DO + , E1, and G1 spin—orbit states of the HgZn exciplex were excited by pump and probe laser irradiation of a HgZn vapor mixture in a quartz cell. The decays of these states gave rise to UV bound—free and visible bound—bound fluorescence spectra which were recorded with a monochromator, and scans of the probe dye laser produced excitation spectra in the region 4000–4600 A. Four new spectra were recorded and analyzed, yielding molecular constants for the various states. The new data also led to improved assignments of some previously reported HgZn spectra.