The mercury dimer is among the most weakly bound metal dimers and has been extensively studied.1The ground state O+gdissociation energy has been considered to lie between 0.55 eV (440 cmminus;1) and 0.091 eV (730 cmminus;1). We report here a spectroscopic study of Hg2in a supersonic jet. The first optical transition, 1ularr;O+g, was characterized by its fluorescence excitation spectrum and the binding energy of the ground state has been measured precisely through the threshold of collision induced dissociation of Hg2thinsp;1uto Hg(1S0)+Hg(3P0).
展开▼
