Accession Number : ADA141559

Title :   Study of Gas-Surface Interactions by Laser-Induced Fluorescence Detection.

Descriptive Note : Final rept. Jun 80-Dec 83,


Personal Author(s) : Zare,R N

PDF Url : ADA141559

Report Date : 01 May 1984

Pagination or Media Count : 7

Abstract : 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 Nd:YAG pumped dye laser which is both frequency doubled and Raman shifted to overlap the NO(gamma) 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 NO/Ag(111) well depth, and a and b are coefficients that express the fraction of kinetic and surface energy appearing as rotational excitation.

Descriptors :   *Gas surface interactions, *Laser induced fluorescence, Interactions, Scattering, Nitrogen oxides, Single crystals, Silver, Rotation, Degrees of freedom, Energy, Excitation, Surface temperature, Dye lasers, Laser pumping, Structural properties

Subject Categories : Physical Chemistry
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE