Vacuum-ultraviolet laser-excited spectra of Xe₂

Abstract

Fluorescence excitation of Xe₂ at 149.0 nm has been observed using a pulsed supersonic jet for dimer formation and cooling and using tunable coherent VUV radiation from four-wave mixing in Mg vapor for excitation. The resolved vibronic structure resulting from isotopic Xe₂ molecules has yielded unambiguous vibrational numbering (υ′ = 37–46), giving the following constants for the first $O_u^{+}$ excited state of Xe₂: T_e = 63 796(6) cm⁻¹, ${\omega }_e^{\prime }=124.86(30){\text{cm}}^{-1}$, ${\omega }_e{x}_e^{\prime }=0.937(3){\text{cm}}^{-1}$, and D_e = 4446(7) cm⁻¹.

© 1984 Optical Society of America

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