High Resolution Spectroscopy of C13O16 in Gas Mixtures
Abstract
A nonintrusive method of measuring the concentration and temperature of specific molecules in the exhaust stream of rocket and turbine engines is being sought to replace the probe methods currently in use. These current methods provide results which are subject to question because the probe itself may chemically alter the exhaust gas composition. The tunable diode laser (TDL) spectrometer system is being developed as a possible replacement for the probes. In the present report, measurements on the C13O16 isotope of CO at 4.7 micrometers will be described. Measurements of pressure broadening parameters were made on the P(17) and P(16) lines of the (1-0) band of C13O16 using 20- percent CO in nitrogen at temperatures ranging from 300 to 900 K. The C12O16 broadening of C13O16 was assumed to be the same as C12O16 self broadening in the data analysis, and the nitrogen broadening of C13O16 was measured as a function of temperature. The results, which were taken at various pressures and temperatures, were extrapolated to standard temperature and pressure. A discussion of the pertinent theory, experimental techniques, and results follows. Originator supplied keywords include: Line width; Pressure broadening; Absorption. Additional keywords include: Collision broadening; Lorentz broadening; Absorption spectra; and Parametric fit.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1985
- Accession Number
- ADA152625
Entities
People
- H. C. Walker Jr.
Organizations
- Arnold Engineering Development Complex