Journal of Chemical Physics, Vol.106, No.23, 9411-9418, 1997
Mass-Resolved 2-Photon Spectra of Xe-2 in the Region of Xe-Asterisk(5D) .1. Vibronic Analyses
Eight band systems of jet-cooled Xe-2 between 83 763.9 and 80 149.8 cm(-1) involving gerade excited states that dissociate to Xe(S-1(0)) + Xe*5d[3/2](1)(0), Xe(S-1(0)) + Xe*5[5/2](3)(0), Xe(S-1(0)) + Xe*5d[5/2](2)(0), Xe(S-1(0)) + Xe*5d[7/2](3)(0), Xe(S-1(0)) + Xe*5d[7/2](4)(0), and Xe(S-1(0)) + Xe(S-1(0)) + Xe*6p[1/2](0) have been characterized using (2 + 1) resonance enhanced multiphoton ionization/time-of-flight mass spectrometry, many for the first time. Excited state vibrational numbering and constants, including dissociation energies were obtained from bandhead measurements made from separate single isotopomer spectra. Bond lengths were estimated from Franck-Condon factor intensity simulations, while excited state electronic symmetries were deduced primarily from polarization measurements. In three instances, energy barriers due to double well potential energy curve formation are identified.
Keywords:ULTRAVIOLET-LASER SPECTROSCOPY;ENHANCED MULTIPHOTON IONIZATION;S-RYDBERG SERIES;XENON 5P5 6P;COLLISIONAL DEACTIVATION;EXCITED XENON;INTERATOMIC POTENTIALS;2-PHOTON SPECTROSCOPY;GENERATING VALENCE;STATE