Two-photon-excited fluorescence measurements of OH concentration in a hydrogen-oxygen flame

Journal Article · Wed Jan 15 04:00:00 EST 1986 · Appl. Opt.; (United States)

DOI:https://doi.org/10.1364/AO.25.000276· OSTI ID:6125349

Goldsmith, J E.M.; Laurendeau, N M

Two-photon-excited fluorescence (TPF) has been used to determine the OH concentration profile in an atmospheric-pressure hydrogen-oxygen flame. Individual rovibronic transitions within the AS -XSPi (0.0) system of OH were identified by comparing calculated wavelengths to emission spectra obtained by laser excitation from 604 to 638 nm. Relative OH concentrations were determined by individually exciting the O1(5), O2(5), and P2(5) transitions and monitoring the resulting fluorescence with a filtered photomultiplier and a gated integrator system. The expected quadratic dependence of the fluorescence signal on laser power was verified indicating the probable lack of photochemical effects. The OH profile determined by the TPF method was found to be in good agreement with that determined by absorption spectroscopy. The estimated OH detection limit using TPF is approx.10 U molecules/cmT at atmospheric pressure.

• Research Organization: Sandia National Laboratories, Combustion Research Facility, Livermore, California 94550
• OSTI ID: 6125349
• Journal Information: Appl. Opt.; (United States), Journal Name: Appl. Opt.; (United States) Vol. 25:2; ISSN APOPA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHEMISTRY
COMBUSTION PROPERTIES
DATA
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
EXPERIMENTAL DATA
FLAMES
FLUORESCENCE
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
LUMINESCENCE
MULTI-PHOTON PROCESSES
NUMERICAL DATA
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOCHEMISTRY
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
ROTATIONAL STATES
VIBRATIONAL STATES
WAVELENGTHS