Accession Number : ADB085773

Title :   Rotational-Vibrational Level Relaxation Effects on Laser-Induced Fluorescence Number Density Measurements of Hydroxide in a Combustion Environment. II. Effects on Vibrational Level Populations.

Descriptive Note : Interim technical rept. Oct 81-Dec 82,

Corporate Author : DAYTON UNIV OH RESEARCH INST

Personal Author(s) : Campbell,D. H.

Report Date : NOV 1983

Pagination or Media Count : 49

Abstract : A full vibrational-rotational level rate equation model has been used to investigate the application of laser-induced fluorescence techniques to number density measurements of hydroxide in a combustion environment. The extent of deviation of the population in the laser-pumped vibrational level from the two-level model prediction, due to collisional exchange mechanisms, was investigated for a range of pressures, temperatures, laser powers, and collisional exchange rates. For accurate number density measurement using wide bandwidth detection, it was determined that lower laser intensities are required at all pressures. (Author)

Descriptors :   *Laser induced fluorescence, *Relaxation, *Molecular rotation, *Molecular vibration, Combustion, Hydroxides, Environments, Density, Mathematical models, Collisions, Exchange, Laser pumping, Pressure, Low intensity, Broadband

Subject Categories : Lasers and Masers
      Atomic and Molecular Physics and Spectroscopy
      Optics
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE