Accession Number : ADA133449

Title :   Interactions of Vibrationally Excited Molecules with Solid Surfaces.

Descriptive Note : Final rept.,

Corporate Author : CORNELL UNIV ITHACA NY

Personal Author(s) : Houston,Paul L ; Merrill,R P

PDF Url : ADA133449

Report Date : 09 Sep 1983

Pagination or Media Count : 28

Abstract : The interaction of gas-phase molecules with solid surfaces is of importance to heterogeneous catalysis, corrosion, air filtration, pollution control, and chemical deactivation. Our research group has recently obtained some of the first direct measurements of the probability for vibrational deactivation during gas-solid collisions. A pulsed infrared laser is used to excite CO of CO2 vibrationally under conditions where the predominant cause of deactivation is due to the gas-surface collision. The probability of relaxation is then monitored by observing the time-dependent decay of infrared fluorescence from the excited molecules. Results for CO2 (001) show that the deactivation probability is 0.22 for collisions with a stainless steel surface, 0.16 for silver, and 0.20 for nickel.

Descriptors :   *Gas surface interactions, *Solids, *Surface chemistry, Collisions, Molecular vibration, Relaxation, Excitation, Deactivation, Energy transfer, Carbon dioxide, Carbon monoxide, Silver, Nickel, Tungsten

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE