Scattering of Vibrationally Excited NO off LiF and CaF2Surfaces

The scattering of a pulsed supersonic beam of vibrationally excited $v^{\prime }=1\mathrm{}$, $J^{\prime }=\frac{3}{2}$ nitric oxide molecules, prepared by tunable ir laser excitation, off LiF and Ca${\mathrm{F}}_2$ surfaces has been investigated by resonantly enhanced two-photon ionization. A survivial probability of less than 2.3×${10}^{-4\mathrm{}}$ has been found. Similarly, an upper limit of less than 2×${10}^{-3\mathrm{}}$ can be given for an energy transfer into other rotational states of $v^{\prime }=1\mathrm{}$ or high $J^{\prime \prime }$ of $v^{\prime \prime }=0\mathrm{}$. The present results will be compared with the predictions of a recent theoretical model calculation.