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 excited state of Xe2: Te = 63 796(6) cm−1, , , and De = 4446(7) cm−1.
© 1984 Optical Society of America
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