A study of infrared radiation of vibrationally excited CO in the 4.7 μm band and CO2 in the 4.3 μm and 2.7 μm bands

Kudryavtsev, N. N.; Новиков, С. С.

doi:10.1051/rphysap:0198100160204900

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…The values of A(co) in the P and R-branches calculated for the conditions considered in this work using the statistical and isolated line models agree to within 5 %. The equivalent width of the Voigt-contoured rotational lines were determined by the procedure described in [11][12][13]. The initial parameters for such calculations are the integrated line intensity Sv'J'~v"J" = +~-~ Kv'J'~v"J"(03C9) de) and the line halfwidth y.…”

Section: C02 Radiation Spectrum In 15 Pm Bandmentioning

confidence: 99%

“…It can be done both by analytical [2] and numerical [1] methods. Radiation intensity and absorptivity of carbon dioxide have been calculated at 4.3 ym in [3][4][5][6][7][8][9][10][11][12][13], at 2.7 pm in [6, 10-13] and at 15 ym in [10] with harmonic oscillator-rigid rotor approximation for determination of rotational lines intensities and spectral distribution for the conditions, where nonequilibrium Boltzmann population distribution in vibrational modes occurrs.…”

Section: Introductionmentioning

confidence: 99%

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Radiation of vibrationally nonequilibrium carbon dioxide in the 12 to 19 μm region

Kryuchkov

Kudryavtsev

Новиков

1984

Rev. Phys. Appl. (Paris)

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2014 On a fait des calculs numériques d'absorptivité et d'intensité de l'émission de CO2 dans la bande vibro-rotationnelle de 15 03BCm en tenant compte des particularités de la structure de cette bande pour une large étendue de paramètres de flux du gaz incluant en particulier les conditions dans les résonateurs de lasers gazodynamiques à CO2 qui fonctionnent dans le domaine spectral de 03BB = 9-11 03BCm et de 03BB = 16-19 03BCm. Les calculs en P et R-branches ont été faits en utilisant un modèle statistique et un modèle de lignes isolées, et en Q-branches ; par une intégration directe « ligne par ligne » à travers le spectre. On a trouvé les dépendances typiques des paramètres du gaz hors d'équilibre vibratoire. Les résultats ont été utilisés afin d'élaborer la méthode déterminant la température vibrationnelle du mode confondu selon l'intensité intégrale d'émission de bande, des populations de certains niveaux vibrationnels et de la température vibrationnelle du mode asymétrique selon l'absorptivité intégrale dans certaines Q-branches. Abstract. 2014 Numerical computations of CO2 absorptivity and radiation intensity have been carried out with regard to specific features of the 15 03BCm vibrational-rotational band within a wide range of gas flow parameters, including, in particular, the conditions in the cavities of gasdynamic CO2 lasers operating in the 03BB = 9-11 03BCm and 03BB = 16-19 03BCm spectral regions. The calculations in the P-and R-branches were carried out using the statistical model and the isolated line model, and in the Q-branches by direct « line-by-line » integration over the spectrum. Typical dependences on the vibrationally excited gas parameters have been determined. The results have been used for developing a method of determination of the vibrational temperature of the bend-stretch manifold according to the integrated radiation intensity of the band, populations of certain vibrational levels, and the vibrational temperature of the asymmetric stretching mode according to integrated absorptivity in certain Q-branches.

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Section: C02 Radiation Spectrum In 15 Pm Bandmentioning

confidence: 99%