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Аршинов, К. И.; Leshenyuk, N. S.; Невдах, В. В.

doi:10.1023/a:1014386728773

Cited by 5 publications

(5 citation statements)

References 5 publications

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“…An exception is the spontaneous emission probabilities A mn ; the corre sponding data in the literature are rather ambiguous [2,3,[14][15][16]. In view of the aforesaid, one must either measure A mn with a high accuracy or apply techniques that do not involve A mn in order to reduce the error in determining .…”

Section: Measurement Techniquementioning

confidence: 99%

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Study of the parameters of the collisionally broadened R22 absorption line of the 1000-0001 transition in CO2 molecules: I. Experiment

Аршинов

Невдах³

2012

Opt. Spectrosc.

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Unsaturated absorption coefficients in pure carbon dioxide at pressures of 1 and 100 Torr and in CO 2 -N 2 and CO 2 -He binary mixtures at a pressure of 100 Torr have been measured in the temperature range of 296-700 K using a frequency stabilized tunable CO 2 laser. The collisional self broadening coefficient, the relative coefficients of collisional broadening caused by N 2 and He buffer gases, and their temperature depen dences have been determined for the R22 absorption line of the 10 0 0-00 0 1 transition in CO 2 molecules.

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Section: Measurement Techniquementioning

confidence: 99%

“…The exponent n in (1) depends on the mechanism of interaction between colliding molecules; for the 10 0 0-00 0 1 transition lines, it ranges from 0.5 to 1 [3,4,8,9]. From this point on, the temperature T is given in kelvins.…”

Section: Introductionmentioning

confidence: 99%

Study of the parameters of the collisionally broadened R22 absorption line of the 1000-0001 transition in CO2 molecules: I. Experiment

Аршинов

Невдах³

2012

Opt. Spectrosc.

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“…Knowledge of the spectroscopic parameters of the appropriate lines of the CO 2 molecule and their temperature dependences is essential in order to use optical methods to determine the CO 2 concentration and temperature in the atmosphere and heated gaseous fuel-combustion products and to calculate the characteristics of powerful industrial CO 2 lasers [1][2][3][4]. Experimental and theoretical results for collisional broadening of molecular spectral lines including those of CO 2 were published [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Collisional broadening of CO2 1000–0001 transition absorption lines by N2O molecules

et al. 2011

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Relative coefficients of collisional broadening caused by N 2 O molecules and their temperature dependences are determined for absorption lines (10 0 0-00 0 1 transition, R-branch) of the CO 2 molecule.Introduction. Knowledge of the spectroscopic parameters of the appropriate lines of the CO 2 molecule and their temperature dependences is essential in order to use optical methods to determine the CO 2 concentration and temperature in the atmosphere and heated gaseous fuel-combustion products and to calculate the characteristics of powerful industrial CO 2 lasers [1-4]. Experimental and theoretical results for collisional broadening of molecular spectral lines including those of CO 2 were published [5][6][7][8]. Although the CO 2 molecule became already long ago the "test" in spectroscopy, several issues related to the determination of spectroscopic parameters for the lines of various transitions of the CO 2 molecule still remain unresolved [9]. It is well known that fuel-combustion products that are released into the atmosphere contain molecules other than CO 2 including nitrous oxide N 2 O. Although the influence of other fossil-fuel-combustion products on collisional broadening of CO 2 spectral lines at elevated temperatures were studied earlier and the results are rather well represented in the contemporary literature, broadening of CO 2 lines by N 2 O buffer gas is practically unstudied. The parameters of the line contours for CO 2 -N 2 O are required in order to populate contemporary "high-temperature" databases such as the "Radiative Properties of Hot Gases" information system (http://spechot.iao.ru) that was developed at the Zuev Institute of Atmospheric Optics, SB, RAS.The goal of the present work was to determine the relative coefficients of collisional broadening of absorption lines (b N 2 O ) for the 10

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“…The exponent n depends on the mechanism through which the colliding molecules interact and for lines of the 10 0 0-00 0 1 transition has values lying within the range 0.5-1.0 according to various sources [2,3,8,9]. Δν L is usually determined directly, by measuring the shape of the absorption line profile using a tuneable radiation source, or by measuring the unsaturated absorption coefficient at a single, e.g., central, absorption line frequency at a pressure which produces a collisionally broadened line profile.…”

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confidence: 99%

“…(2) have been measured for CO 2 with fairly high accuracy. The exception is the spontaneous emission probability A mn , for which the published values have a rather large uncertainty [2,[11][12][13]. Given this, in order to increase the accuracy of the determination of γ CO 2 −CO 2 , it is either necessary to measure A mn or to propose a method that does not use A mn .…”

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Parameters of the collisionally broadened R22 absorption line of the 1000–0001 transition of the CO2 molecule

Аршинов

Невдах

2011

J Appl Spectrosc

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A frequency stabilized, tuneable CO 2 laser is used to measure the unsaturated absorption coefficients of pure carbon dioxide gas at pressures of 1 and 100 Torr and temperatures of 296-700 K. The radiative transition probability and the temperature dependence of the collisional self-broadening coefficient are determined for the R22 absorption line of the 10 0 0-00 0 1 transition of the CO 2 molecule. The exponent on the temperature is found to depend on the method used to determine the collisional self-broadening coefficient.Introduction. Multifrequency diagnostics of the atmosphere and of the hot gaseous combustion products of fuels by means of frequency tuneable CO 2 lasers, as well as calculations of the characteristics of high-power CO 2 lasers, require knowledge of the spectroscopic parameters of the relevant absorption lines of the CO 2 molecule and their temperature dependences [1][2][3][4][5][6]. Thus, the CO 2 molecule has long been the subject of comprehensive (including optical) studies aimed at determining these parameters. It has been noted [7] that CO 2 is a "test" molecule for spectroscopy. But, despite a large amount of research, a number of problems associated with determining the spectroscopic parameters of the lines of various transitions of the CO 2 molecules remain unsolved.The dependence of the collisional width Δν L (FWHM, full width half maximum) of a spectral line of the CO 2 molecule as function of gas temperature T is usually written in the form [2]

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Cited by 5 publications

References 5 publications

Study of the parameters of the collisionally broadened R22 absorption line of the 1000-0001 transition in CO2 molecules: I. Experiment

Study of the parameters of the collisionally broadened R22 absorption line of the 1000-0001 transition in CO2 molecules: I. Experiment

Collisional broadening of CO2 1000–0001 transition absorption lines by N2O molecules

Parameters of the collisionally broadened R22 absorption line of the 1000–0001 transition of the CO2 molecule

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