TIME-RESOLVED SPECTROSCOPY OF GASEOUS XENON EXCITED IN THE VICINITY OF THE 1ST RESONANCE LINE

Time-resolved measurements of gas-phase xenon luminescence in the firs t and second continua by means of synchrotron radiation excitation in the vicinity of the first resonance line in the pressure range 50-1000 Torr were performed. By using a fast channelplate-detector (fwhm = 25 0 ps) the fast and slow rise and decay luminescence components were an alysed. A strong collisional mixing of 0u+ and 1u/0u- states in the ma nifold of high vibrational levels is observed. From the measurements c onstants of collisional-induced predissociation of Xe2 (0u+)upsilon > > 0, collisional mixing in high v, vibrational relaxation and three-bo dy recombination from atomic P-3(1) and P-3(2) levels are derived. Add itionally, lifetimes of vibrationally excited 0u+ state were extracted from the experimental data. A set of consistent rate constants measur ed in a most direct way is presented.