DEACTIVATION OF 2-PHOTON-EXCITED XE(5P(5)6P,6P',7P) AND KR(4P(5)5P) IN XENON AND KRYPTON

Lifetimes and bimolecular quenching rate constants have been determined for two-photon laser excited states ofXe*(5p56p, 5p 56p′,5p57p) and Kr*(4p55p) in krypton and xenon buffer gases. Collisional mixing between Kr*5p[5/2] 2 and Kr*5p[5/2]3 in krypton is observed and analyzed using a coupled two-state model to obtain the rate of mixing. The measured rate constants for quenching of Xe*(6p′ ,7p) by krypton are 15%-20% smaller than those measured previously in xenon while bimolecular rates for the Kr*(5p) states are an order of magnitude larger in xenon than those in a krypton buffer. Measurements of state-to-state rate constants for deactivation and excitation transfer are also reported for these states in krypton and xenon buffer gases. © 1995 American Institute of Physics.