화학공학소재연구정보센터
Journal of Chemical Physics, Vol.106, No.13, 5423-5428, 1997
Photodissociation of Kr2F(4(2)Tau) in the Ultraviolet and Near-Infrared - Wavelength Dependence of KrF(B-2-Sigma) Yield
The photoabsorption spectrum of the 4 (2) Gamma excited state of Kr2F has been measured in the 280-850 nm region by fluorescence suppression spectroscopy. Both the 9 (2) Gamma<--4 (2) Gamma and 6 (2) Gamma<--4 (2) Gamma bands, peaking at 320 and similar to 710 nn, 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 similar to 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 (2) Gamma) 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 (2) Gamma and 6 (2) Gamma states by potentials correlated with the KrF(D) + Kr and KrF(C) + Kr limits, respectively.