NEW VISIBLE EMISSION-SPECTRA OF GABR, GACL AND INCL - PROSPECTS OF NEW LASER TRANSITIONS

Broad emission spectra have been observed for the first time in the vi sible region at 4600, 5000 and 5750 angstrom and are assigned to the d iatomic molecules GaBr, GaCl and InCl, respectively. No structure is s een on the low-frequency side, while on the high-frequency side, some undulatory fluctuation bands are observed. The electronic transition i s identified as a transition from an upper bound singlet or a triplet electronic state to the lower C 1PI state which is predissociated. The se transitions hold the potential to be developed into an efficient ex cimer laser medium, similar to the laser action obtained in the rare g as halides.