کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5428624 | 1508685 | 2013 | 14 صفحه PDF | دانلود رایگان |

- Development of a quantum coordinate model for the half-width and line shift.
- Calculations of γ and δ for N2-, O2-, air-, and CO2-CO2 systems for 24 bands.
- Jâ³=0-160, bands up to Îν1=3, Îν2=5, Îν3=9, 9 temperatures from 200-2000 K.
- γ, n, δ, prediction routines for all ro-vibrational transitions up to Jâ³=200.
The vibrational dependence of CO2 half-widths and line shifts are given by a modification of the model proposed by Gamache and Hartmann [Gamache R, Hartmann J-M. J Quant Spectrosc Radiat Transfer 2004;83:119]. This model allows the half-widths and line shifts for a ro-vibrational transition to be expressed in terms of the number of vibrational quanta exchanged in the transition raised to a power and a reference ro-vibrational transition. Calculations were made for 24 bands for lower rotational quantum numbers from 0 to 160 for N2-, O2-, air-, and self-collisions with CO2. These data were extrapolated to Jâ³=200 to accommodate several databases. Comparison of the CRB calculations with measurement gives very high confidence in the data. In the model a Quantum Coordinate is defined by (c1 |Îν1|+c2 |Îν2|+c3|Îν3|)p. The power p is adjusted and a linear least-squares fit to the data by the model expression is made. The procedure is iterated on the correlation coefficient, R, until [|R|â1] is less than a threshold. The results demonstrate the appropriateness of the model. The model allows the determination of the slope and intercept as a function of rotational transition, broadening gas, and temperature. From the data of the fits, the half-width, line shift, and the temperature dependence of the half-width can be estimated for any ro-vibrational transition, allowing spectroscopic CO2 databases to have complete information for the line shape parameters.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 130, November 2013, Pages 158-171