THE ROTATIONALLY RESOLVED G0(U)-A0(G)+ ELECTRONIC-SPECTRUM OF THE (HG-202)(2) EXCIMER([)

Isotopically pure Hg-202 vapor, contained in a quartz cell, was irradi ated with frequency-doubled 5140 angstrom output from an Ar+ laser, wh ich caused the formation of Hg2A0g+/- excimer molecules by photoassoci ation. Simultaneous probe radiation from a ring dye laser scanned over a range 5400-6000 angstrom, produced the G0u+<--A0g+ excitation spect rum which consists of several hundred well-resolved rotational compone nts that have not been previously observed. Two vibronic bands were su bjected to a rotational analysis which yielded spectroscopic constants that are compared with some previously reported values.