OBSERVATION OF THE $C(3/2)\leftarrow X(1/2)$ TRANSITION IN XeF
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Date
1983
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Publisher
Ohio State University
Abstract
$XeF(X_{v}-)$, produced by KrF Laser hotodissociation of $XeF_{2}$, is excited by a doubled dye-laser to $XeF(B_{v^{\prime}})$ and $XeF(C_{v^{\prime}})$ and the broad-band $B\rightarrow A$ and $C\rightarrow A$ fluorescence is detected. The B and C states are distinguished by their differing decay rates at low pressure. Through its fluorescence excitation spectrum the $C\leftarrow X$ transition is observed for the first time. The vibrational analysis of the C-X bands locates the $C(v^{\prime}=0)$ level at $775 cm^{-1}$ below the $B(v^{\prime}=0)$ level, and yields the first experimental vibrational constants for the C state $(\omega_{e} = 346 cm^{-1}$ and $\omega_{e}x_{e} = 2.2 cm^{-1})$. A bandshape analysis of the C-X bands suggests that the equilibrium internuclear separation of the C state lies around 2.45 \AA. Vibrational relaxation and vibrationally resolved collision-induced dissociation of $XeF(X_{v}-)$ are also observed. Supported by the Defense Advanced Research Projects Agency under contract N0014-80-C-0506,through the office of Naval Research.
Description
Author Institution: Molecular Physics Laboratory, SRI International