Accession Number : AD0773585

Title :   Chemical Excitation via Laser Radiation: Vibration-Vibration Energy Transfer Processes.

Descriptive Note : Final technical rept. 1 Oct 70-30 Sep 73,

Corporate Author : CORNELL UNIV ITHACA N Y DEPT OF CHEMISTRY

Personal Author(s) : Bauer,Simon H. ; Quiring,Walter J. ; Lory,Earl ; Buchwald,Melvin I. ; Shaub,Walter

Report Date : DEC 1973

Pagination or Media Count : 133

Abstract : Two groups of experiments were conducted on augmenting chemical conversions by laser radiation. The authors were successful in using the stimulated raman effect (SRE) to obtain, at room temperature, substantial populations in the v=1 state in H2/D2 mixtures, and to demonstrate that in such mixtures small amounts of HD were produced. A rudimentary model for atom switching due to vibrational excitation was submitted to computer analysis and checked semiquantitatively. The second group of experiments concerned systems in which v-T relaxations were rapid, so that irradiation from a CO2 cw laser produced homogeneous heating. The pyrolysis of ammonia has been successfully completed. A laser powered homogeneous reactor (designated LPHR) is being tested. It is particularly suitable for measuring relative reaction rates, and permits estimation of relative activation energies. (Modified author abstract)

Descriptors :   *Molecular vibration, *Energy transfer, Molecular energy levels, Chemical reactions, Ammonia, Raman spectra, Excitation, Infrared radiation, Lasers, Chemical reactions, Emission spectra, Cross sections, Hydrogen, Deuterium, Pyrolysis, Reaction kinetics

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE