The photoabsorption spectrum of the 4 2Γ excited state of Kr2F has been measured in the 280-850 nm region by fluorescence suppression spectroscopy. Both the 9 2Γ←4 2Γ and 6 2Γ←4 2Γ bands, peaking at 320 and ∼710 nm, respectively, have been observed - the latter for the first time. Although the position of the ultraviolet band is consistent with both theory and previous experiments, its spectral width is ∼40% of that measured by Greene and McCown [Appl. Phys. Lett. 54, 1965 (1989)] in absorption experiments in a pulsed discharge. The relative yield of KrF(B) produced in the photodissociation of Kr2F(4 2Γ) was found to be independent of wavelength over the 280-360 nm and 590-840 nm spectral intervals and the mechanism responsible for photodissociation appears to be predissociation of the Kr2F 9 2Γ and 6 2Γ states by potentials correlated with the KrF(D) + Kr and KrF(C) + Kr limits, respectively.
|Original language||English (US)|
|Number of pages||6|
|Journal||Journal of Chemical Physics|
|State||Published - Apr 1 1997|
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry