Abstract
Xe 2 molecules in a supersonic free jet have been excited to the C′ 1 u state with tunable and monochromatic VUV laser radiation generated by four-wave difference frequency mixing in Kr. From the vibrationally resolved excitation spectrum, the following spectroscopy constants are derived for the C′ 1 u state: T′ e = 77240.6, ω′ e = 16.2, ω eχ′ e = 1.1, and D′ e = 140 cm −1. It was also found that the radiative lifetimes of the ν′ = 0 and 1 states of the C′ 1 u state were 4.3±0.5 and 3.8±0.6 ns, respectively.
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