Laser spectroscopy of the HgZn excimer

Extensive and previously unknown fluorescence and excitation spectra of the HgZn excimer have been observed and correlated with a potential-energy (PE) diagram. The spectra were excited in a Hg-Zn mixture contained in a quartz vapor cell by successive pulses from two dye lasers, using the pump-and-probe methods, and the PE curves were derived from Hg and Zn atomic parameters, previously known ${\mathrm{Hg}}_2$ and ${\mathrm{Zn}}_2$ curves, and from molecular-orbital considerations. There is good agreement between the measured and calculated transition energies.