MASS-RESOLVED 2-PHOTON SPECTRA OF ARXE IN THE REGION OF XE-ASTERISK(6P)

(2+1) resonantly enhanced multiphoton ionization (REMPI) spectra of Ar Xe have been recorded between approximate to 78 000 and 80 110.0 cm(-1 ). Single isotopomer data was obtained using a time-of-flight (TOF) ma ss spectrometer. Vibrational analyses for several transitions involvin g ArXe excited states that dissociate to Ar(S-1(0))+Xe(6p) are presen ted, in some instances, for the first time. In addition to vibrational numbering and constants, excited state symmetries were deduced from s eparate REMPI/TOF spectra recorded with linearly and circularly polari zed light, while excited state bond lengths were derived from Franck-C ondon factor calculations. Some of the excited states were found to ha ve potential humps and/or unusual vibrational band intensity distribut ions. Where possible, the nature of the perturbations is discussed. (C ) 1996 American Institute of Physics.