Study of Gas-Surface Interactions by Laser-Induced Fluorescence Detection.
Final rept. Jun 80-Dec 83,
STANFORD UNIV CA DEPT OF CHEMISTRY
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The scattering of nitric oxide NO from a clean single-crystal of silver THE 111 FACE has been studied. The rotational and fine structure distributions of NOXsq pi have been determined as a function of surface temperature and of incident kinetic energy normal to the surface plane. The analysis technique is that of laser-induced fluorescence using a NdYAG pumped dye laser which is both frequency doubled and Raman shifted to overlap the NOgamma band system in the UV. It is found that the energy transferred into the NO rotational degree of freedom in a single gas-surface encounter is expressed by where E sub r is the mean rotational energy, E sub n the normal component of the NO kinetic energy, E sub s the surface temperature, E wub w a parameter characterizing the NOAg111 well depth, and a and b are coefficients that express the fraction of kinetic and surface energy appearing as rotational excitation.
- Physical Chemistry
- Lasers and Masers