Vol. 34, issue 05, article # 4

Kapitanov V. A., Osipov K. Yu., Protasevich A. E., Ponomarev Yu. N., Ponurovskii Ya. Ya. Dicke narrowing, speed dependence and line mixing of self-broadened CO2 absorption lines in the 30013 ← 00001 band. Measurements and line shape testing. // Optika Atmosfery i Okeana. 2021. V. 34. No. 05. P. 334–342. DOI: 10.15372/AOO20210504 [in Russian].
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Experimental results are presented for self-broadening and shift of six isolated absorption lines of CO2 versus pressure in the 1.6 μm spectral range at a room temperature. The measurements were carried out at a high-sensitivity high-resolution diode laser spectrometer with a signal-to-noise ratio of 3000 to 7000. To describe the experimental spectra, five theoretical line profile models VP, RP, qSDRP, qSDVP, and qSDVP + LM were used. A strong influence of weak closely spaced lines on the parameters retrieved (intensity and collisional broadening coefficient) of strong lines was found, as well as nonlinear pressure dependence of narrowing parameter for RP and qSDRP line profile models. The linear pressure dependence of the parameters retrieved for qSDVP + LM line profile is shown in the range from 0.001 to 1 atm.


laser spectrometer, absorption line profile, pressure dependence, CO2 molecule


  1. Petrova T.M., Solodov A.M., Shcherbakov A.P., Dejchuli V.M., Solodov A.A., Ponomarev Yu.N. Sravnenie modelej kontura dlya opisaniya linij pogloshcheniya molekuly vody // Optika atmosf. i okeana. 2021. V. 34, N 3. P. 159–163.
  2. Hartmann J.-M., Tran H., Armante R., Boulet C., Campargue A., Forget F., Gianfrani L., Gordon I., Guerlet S., Gustafsson M., Hodges J.T., Kassi S., Lisak D., Thibault F., Toon G.C. Recent advances in collisional effects on spectra of molecular gases and their practical consequences. // J. Quant. Spectrosc. Radiat. Transfer. 2018. V. 213. P. 178–227.
  3. Ngo N.H., Lisak D., Tran H., Hartmann J.-M. An isolated line-shape model to go beyond the Voigt profile in spectroscopic databases and radiative transfer codes // J. Quant. Spectrosc. Radiat. Transfer. 2013. V. 129. P. 89–100.
  4. Rosenkranz P. Shape of the 5 mm oxygen band in the atmosphere // IEEE Trans. Antennas. Propag. 1975. V. 23. P. 498–506.
  5. Fadeeva V.N., Terent'ev N.M. Tablitsy znachenij integrala veroyatnostej ot kompleksnogo argumenta. M.: Gostekhizdat, 1954. 268 p.
  6. Rautian S.G., Sobel'man I.I. Vliyanie stolknovenij na doplerovskoe ushirenie spektral'nyh linij // Uspekhi fiz. nauki. 1966. V. 90. P. 209–236.
  7. Rohart F., Mader H., Nikolaisen H.-W. Speed dependence of rotational relaxation induced by foreign gas collisions: Studies on CH3F by millimeter wave coherent transients // J. Chem. Phys. 1994. V. 101. P. 6475–6486.
  8. Roharf F., Ellendt A., Kaghat F., Mäder H. Self and polar foreign gas line broadening and frequency shifting of CH3F: Effect of the speed dependence observed by millimeter-wave coherent transients // J. Mol. Spectrosc. 1997. V. 185. P. 222–233.
  9. Voigt W. Über das gesetz intensitätsverteilung innerhalb der linien eines gasspektrams. München: Sitzber. Bayr. Akad., 1912. 603 p.
  10. Boone C.D., Walker K.A., Bernath P.F. Speed-dependent Voigt profile for water vapor in infrared remote sensing applications // J. Quant. Spectrosc. Radiat. Transfer. 2007. V. 105. P. 525–532.
  11. Lisak D., Havey D.K., Hodges J.T. Spectroscopic line parameters of water vapor for rotation-vibration transitions near 7180 cm-1 // Phys. Rev. A. 2009. V. 79. P. 052507-1–052507-10.
  12. Levy A., Lacome N., Chackerian Jr.C. Collisional line mixing / Rao K. Narahari, A. Weber (eds.). Spectroscopy of the Earth's Atmosphere and Interstellar Medium. Boston, MA: Academic Press, 1992. P. 261–337.
  13. Pine A.S. Asymmetries and correlations in speed-dependent Dicke-narrowed line-shapes of argon broadened HF // J. Quant. Spectrosc. Radiat. Transfer. 1999. V. 62. P. 397–423.
  14. Ciurylo R., Pine A.S., Szudy J. A generalized speed-dependent line profile combining soft and hard partially correlated Dicke-narrowing collisions // J. Quant. Spectrosc. Radiat. Transfer. 2001. V. 68. P. 257–271.
  15. Ciurylo R., Pine A.S. Speed-dependent line mixing profiles // J. Quant. Spectrosc. Radiat. Transfer. 2000. V. 67. P. 375–393.
  16. De Vizia M.D., Castrillo A., Fasci E., Amodio P., Moretti L., Gianfrani L. Experimental test of the quadratic approximation in the partially correlated speed-dependent hard-collision profile // Phys. Rev. A. 2014. V. 90. P. 022503-1-7.
  17. Benner D.C., Rinsland C.P., Devi V.M., Smith M.A.H., Atkins D. A multispectrum nonlinear squares fitting technique // J. Quant. Spectrosc. Radiat. Transfer. 1995. V. 53, N 6. P. 705–721.
  18. Jacquemart J.-Y., Mandin V., Dana N., Picque, Guelachvili G. A multispectrum fitting procedure to deduce molecular line parameters: Application to the 3–0 band of 12C16O // Eur. Phys. J. 2001. V. 14. P. 55–69.
  19. Winn E.B. The temperature dependence of the self-diffusion coefficients of Argon, Neon, Nitrogen, Oxygen, Carbon Dioxide, and Methane // Phys. Rev. 1950. V. 80, N 6. P. 1024–1027.
  20. Hadded S., Thibault F., Flaud P.M., Aroui H., Hartmann J.M. Experimental and theoretical study of line mixing in NH3 spectra. I. Scaling analysis of parallel bands perturbed by He // J. Chem. Phys. 2002. V. 116. P. 7544–7557.
  21. Hadded S., Thibault F., Flaud P.M., Aroui H., Hartmann J.M. Experimental and theoretical study of line mixing in NH3 spectra. II. Effect of the perturber in infrared parallel bands // J. Chem. Phys. 2004. V. 120. P. 217–222.
  22. Hartmann J.M., Tran H., Toon G.C. Influence of line mixing on the retrievals of atmospheric CO2 from spectra in the 1.6 and 2.1 μm regions // Atmos. Chem. Phys. 2009. V. 9. P. 7303–7312.
  23. Tran H., Hartmann J.M., Toon G.C., Broun L.R., Frankenberg C., Warneke T., Spietz P., Hase F. The 2ν3 band of CH4 revisited with line mixing. Consequences for spectroscopy and atmospheric retrievals at 1.67 mm // J. Quant. Spectrosc. Radiat. Transfer. 2010. V. 111. P. 1344–1356.
  24. Predoi-Cross A., Unni A.V., Liu W., Schofield I., Holladay C., McKellar A.R.W., Hurtmans D. Line shape parameters measurement and computations for self-broadened carbon dioxide transitions in the 30012 ← 00001 and 30013 ← 00001 bands, line mixing, and speed dependence // J. Mol. Spectrosc. 2007. V. 245. P. 34–51.