The OH radiation intensity in the 3064 Å band, the temperature, and the OH concentration were measured as a function of the height above the face of a premixed H2/O2 flat flame burner. The burner was operated fuel lean at subatmospheric ambient conditions. Examination of possible reaction mechanisms that could produce chemiluminescent OH radiation from these hydrogen-lean flames led to results consistent with those obtained in hydrogen-rich flames. The termolecular rate coefficient for the reaction H+OH+OH→H2O+OH* was found to be (2.3±0.9) × 10−32 cm6 molecules−2 · sec−1. The value represents an upper bound for the rate coefficients of the reactions which might contribute to the excitation of OH.

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Undoped and doped CdS08 Se02 crystals were grown by physical vapor transport (PVT). The selected dopant was vanadium at a nominal concentration of I 50 ppm creating for photorefractive effect. The as-grown crystal has a large crystal size, 1 . 1 cm in diameter and 6 cm in length, with a medium resistivity of lO -iO ()-cm. The results from low temperature photoluminescence (PL) show that the undoped crystal has only one emission band at 2.31 eV and its phonon replicas. The vanadium doped crystal not only show the similar emission band but also has a additional broad band center at 1.95 eV due to the effect ofdoping. Low temperature (16 K) and room temperature JR transmittance spectra ofvanadium doped crystal revealed a broad absorption band between 0.8 and 1.3 eV which may due to vanadium dopant. Etch pitch density (EPD) measurements were performed, and the results showed EPD in the range of 104/cm2for both types oferystals. Precipitate/inclusion were also found in both crystal, and their distribution patterns may related to gravity-induced convection during growth process.

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Available in DDC KEY WORDS {Continue on reveiee ardo it nectatvy and identity by block number)spectra simulation resonance band spectra transmitting profiles measurements (concentration) ABSTRACT (Continue on reverse side II neceemery and Identity by block number)The equations necessary for the calculation of the integrated transmission of overlapped, Doppler-Broadened spectral lines through a medium at a specified density, temperature, and path length are developed in conjunction with a computation procedure for simulation of a spectrometer output. The application is then made to resonance absorption by diatomic molecules. Existing band transmission data for the (0,0) band of the y-system of the 0D IJAN73 1473 EDITION OF I NOV«S IS OBSOLETE UNCLASSIFIED UNCLASSIFIED 20. ABSTRACT (Continued) nitric oxide molecule at low pressures are used to test the calculations. Satisfactory agreement between measured and calculated transmission spectral profiles was obtained.