The OH collision broadening parameter in the 2900°K H2-NO flame

doi:10.1016/0022-4073(80)90106-5

Journal of Quantitative Spectroscopy and Radiative Transfer

Volume 23, Issue 3, March 1980, Pages 303-305

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Abstract

The collision broadening parameter of the Q₁6 line in the OH (0, 0) A → X u.v. transition has been determined by the curve of growth method in atmospheric pressure nitric oxide-hydrogen flames, in the temperature range 2800–2900°K. An average value of 0.05 was found for this parameter for five flames varying in feed composition between 40 and 65% NO. The exact flame gas compositions and temperatures for which these determinations were made are given in the paper. The data obtained are in agreement with those obtained by Carrington² for atmospheric hydrogen-oxygen flames at 2600°K.

References (5)

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Cited by (5)

Shock-tube study of pressure broadening of the A2∑+ - X2Π (0,0) band of OH by Ar and N<inf>2</inf>
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A rapid-tuning, frequency-doubled ring dye laser was used to make fully-resolved lineshape measurements of OH generated behind reflected shock waves in H₂-O₂-Ar and H₂-O₂-N₂ mixtures. Values of the collisional linewidth were deduced by fitting the observed lineshapes to Voigt profiles. Lines corresponding to transitions with lower-state rotational quantum numbers ranging from 1.5 to 17.5 in the A²∑⁺ - X²Π (0,0) band near 307 nm were probed in order to evaluate a possible J″-dependence in the observed broadening. The temperature range investigated was 1400–4100 K. The collisional broadening parameter, 2γ, was measured at fixed temperature and did not exhibit a strong dependence on the rotational quantum number for either Ar or N₂. The temperature dependence of 2γ for specific J″-values was measured and fit to a power law with an average value of the temperature exponent of 0.8 for both species.
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Journal of Quantitative Spectroscopy and Radiative Transfer

Abstract

References (5)

JQSRT

JQSRT

Cited by (5)

Shock-tube study of pressure broadening of the A<sup>2</sup>∑<sup>+</sup> - X<sup>2</sup>Π (0,0) band of OH by Ar and N<inf>2</inf>

Doppler-free two-photon-excited fluorescence spectroscopy of oh in flames

One hundred and fifty-three diatomic molecules, molecular ions, and radicals of astrophysical interest

Kr<sup>+</sup> laser excitation of NH<inf>2</inf> in atmospheric pressure flames

Rapid-tuning frequency-doubled ring dye laser for high resolution absorption spectroscopy in shock-heated gases