Abstract

Collision-broadened halfwidths of three lines in the ν3 fundamental band and of four lines in the ν6 fundamental band of 12CH3D have been measured at temperatures between 123 and 295 K using the Doppler-limited spectral resolution of a tunable diode laser spectrometer. Temperature dependence of the linewidths has been determined in self-broadening and in broadening by H2, He, and N2.

© 1989 Optical Society of America

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  1. R. Beer, C. B. Farmer, R. H. Norton, J. V. Martonchik, T. G. Barnes, “Jupiter: Observation of Deuterated Methane in the Atmosphere,” Science 175, 1360 (1972); R. Beer, F. W. Taylor, “The Abundance of CH3D and the D/H Ratio in Jupiter,” Astrophys. J. 179, 309 (1973).
    [CrossRef] [PubMed]
  2. V. Kunde et al., “The Tropospheric Gas Composition of Jupiter’s North Equatorial Belt (NH3,PH3,CH3D,GeH4,H2O) and the Jovian D/H Isotopic Ratio,” Astrophys. J. 263, 443 (1982).
    [CrossRef]
  3. R. Hanel et al., “Infrared Observations of the Jovian System from Voyager 1,” Science 204, 972 (1979).
    [CrossRef] [PubMed]
  4. R. Hanel et al., “Infrared Observations of the Jovian System from Voyager 2,” Science 206, 952 (1979).
    [CrossRef] [PubMed]
  5. R. Hanel et al., “Infrared Observations of the Saturnian System from Voyager 1,” Science 212, 192 (1981).
    [CrossRef] [PubMed]
  6. V. G. Kunde, A. C. Aiken, R. A. Hanel, D. E. Jennings, W. C. Maguire, R. Samuelson, “C4H2, HC3N and C2N2 in Titan’s Atmosphere,” Nature London 292, 686 (1981).
    [CrossRef]
  7. R. Hanel et al., “Infrared Observations of the Saturnian System from Voyager 2,” Science 215, 544 (1982).
    [CrossRef] [PubMed]
  8. World Meteorological Organization (WMO), Atmospheric Ozone 1985, Assessment of Our Understanding of the Processes Controlling Its Present Distribution and Change (Global Ozone Research Monitoring Project-Report 16, WMO, Geneva, 1986), p. 98.
  9. S. Chudamani, P. Varanasi, “Measurements on 4.7 μm CH3D Lines Broadened by H2 and N2 at Temperatures Relevant to Planetary Atmospheres,” J. Quant. Spectrosc. Radiat. Transfer 38, 179 (1987).
    [CrossRef]
  10. P. Varanasi, S. Chudamani, S. Kapur, “Diode Laser Measurements of CO Line Widths at Planetary Atmospheric Temperatures,” J. Quant. Spectrosc. Radiat. Transfer 38, 167 (1987).
    [CrossRef]
  11. P. Varanasi, S. Chudamani, “Tunable Diode Laser Measurements of Collision-Broadened Line Widths in the ν4-Fundamental Band of 12CH4 at Low Temperatures,” J. Quant. Spectrosc. Radiat. Transfer (in press).
  12. D. E. Jennings, “Absolute Line Strengths in ν4, 12CH4: a Dual-Beam Diode Laser Spectrometer with Sweep Integration,” Appl. Opt. 19, 2695–2700 (1980).
    [CrossRef] [PubMed]
  13. S. S. Penner, Quantitative Molecular Spectroscopy and Gas Emissivities (Addison-Wesley, Reading, MA, 1959), Chap. 3.
  14. E. E. Whiting, “An Empirical Approximation to the Voigt Profile,” J. Quant. Spectrosc. Radiat. Transfer 8, 1379 (1968).
    [CrossRef]
  15. J. J. Olivero, R. L. Longbothum, “Empirical Fits to the Voigt Line Width: A Brief Review,” J. Quant. Spectrosc. Radiat. Transfer 17, 233 (1977).
    [CrossRef]
  16. T. D. Wilkerson, G. Schwemmer, B. Gentry, L. P. Giver, “Intensities and N2 Collision-Broadening Coefficients Measured for Selected H2O Absorption Lines Between 715 and 732 nm,” J. Quant. Spectrosc. Radiat. Transfer 22, 315 (1979).
    [CrossRef]
  17. V. M. Devi, C. P. Rinsland, D. C. Benner, M. A. H. Smith, K. B. Thakur, “Absolute Intensities and Self-, N2-, and Air-Broadened Lorentz Halfwidths for Selected Lines in the ν3 Band of 12CH3D from Measurements with a Tunable Diode Laser Spectrometer,” Appl. Opt. 25, 1848 (1986).
    [CrossRef] [PubMed]
  18. V. M. Devi, D. C. Benner, C. P. Rinsland, M. A. H. Smith, K. B. Thakur, “Diode-Laser Measurements of Intensities and Halfwidths in the ν6 Band of 12CH3D,” J. Mol. Spectrosc. 122, 182 (1987).
    [CrossRef]
  19. N. Lacome, F. Cappellani, G. Restelli, “Tunable Diode Laser Measurements of Broadening Coefficients of Lines in the ν6 Fundamental of 12CH3D,” Appl. Opt. 26, 766–768 (1987).
    [CrossRef] [PubMed]

1987 (4)

S. Chudamani, P. Varanasi, “Measurements on 4.7 μm CH3D Lines Broadened by H2 and N2 at Temperatures Relevant to Planetary Atmospheres,” J. Quant. Spectrosc. Radiat. Transfer 38, 179 (1987).
[CrossRef]

P. Varanasi, S. Chudamani, S. Kapur, “Diode Laser Measurements of CO Line Widths at Planetary Atmospheric Temperatures,” J. Quant. Spectrosc. Radiat. Transfer 38, 167 (1987).
[CrossRef]

V. M. Devi, D. C. Benner, C. P. Rinsland, M. A. H. Smith, K. B. Thakur, “Diode-Laser Measurements of Intensities and Halfwidths in the ν6 Band of 12CH3D,” J. Mol. Spectrosc. 122, 182 (1987).
[CrossRef]

N. Lacome, F. Cappellani, G. Restelli, “Tunable Diode Laser Measurements of Broadening Coefficients of Lines in the ν6 Fundamental of 12CH3D,” Appl. Opt. 26, 766–768 (1987).
[CrossRef] [PubMed]

1986 (1)

1982 (2)

R. Hanel et al., “Infrared Observations of the Saturnian System from Voyager 2,” Science 215, 544 (1982).
[CrossRef] [PubMed]

V. Kunde et al., “The Tropospheric Gas Composition of Jupiter’s North Equatorial Belt (NH3,PH3,CH3D,GeH4,H2O) and the Jovian D/H Isotopic Ratio,” Astrophys. J. 263, 443 (1982).
[CrossRef]

1981 (2)

R. Hanel et al., “Infrared Observations of the Saturnian System from Voyager 1,” Science 212, 192 (1981).
[CrossRef] [PubMed]

V. G. Kunde, A. C. Aiken, R. A. Hanel, D. E. Jennings, W. C. Maguire, R. Samuelson, “C4H2, HC3N and C2N2 in Titan’s Atmosphere,” Nature London 292, 686 (1981).
[CrossRef]

1980 (1)

1979 (3)

R. Hanel et al., “Infrared Observations of the Jovian System from Voyager 1,” Science 204, 972 (1979).
[CrossRef] [PubMed]

R. Hanel et al., “Infrared Observations of the Jovian System from Voyager 2,” Science 206, 952 (1979).
[CrossRef] [PubMed]

T. D. Wilkerson, G. Schwemmer, B. Gentry, L. P. Giver, “Intensities and N2 Collision-Broadening Coefficients Measured for Selected H2O Absorption Lines Between 715 and 732 nm,” J. Quant. Spectrosc. Radiat. Transfer 22, 315 (1979).
[CrossRef]

1977 (1)

J. J. Olivero, R. L. Longbothum, “Empirical Fits to the Voigt Line Width: A Brief Review,” J. Quant. Spectrosc. Radiat. Transfer 17, 233 (1977).
[CrossRef]

1972 (1)

R. Beer, C. B. Farmer, R. H. Norton, J. V. Martonchik, T. G. Barnes, “Jupiter: Observation of Deuterated Methane in the Atmosphere,” Science 175, 1360 (1972); R. Beer, F. W. Taylor, “The Abundance of CH3D and the D/H Ratio in Jupiter,” Astrophys. J. 179, 309 (1973).
[CrossRef] [PubMed]

1968 (1)

E. E. Whiting, “An Empirical Approximation to the Voigt Profile,” J. Quant. Spectrosc. Radiat. Transfer 8, 1379 (1968).
[CrossRef]

Aiken, A. C.

V. G. Kunde, A. C. Aiken, R. A. Hanel, D. E. Jennings, W. C. Maguire, R. Samuelson, “C4H2, HC3N and C2N2 in Titan’s Atmosphere,” Nature London 292, 686 (1981).
[CrossRef]

Barnes, T. G.

R. Beer, C. B. Farmer, R. H. Norton, J. V. Martonchik, T. G. Barnes, “Jupiter: Observation of Deuterated Methane in the Atmosphere,” Science 175, 1360 (1972); R. Beer, F. W. Taylor, “The Abundance of CH3D and the D/H Ratio in Jupiter,” Astrophys. J. 179, 309 (1973).
[CrossRef] [PubMed]

Beer, R.

R. Beer, C. B. Farmer, R. H. Norton, J. V. Martonchik, T. G. Barnes, “Jupiter: Observation of Deuterated Methane in the Atmosphere,” Science 175, 1360 (1972); R. Beer, F. W. Taylor, “The Abundance of CH3D and the D/H Ratio in Jupiter,” Astrophys. J. 179, 309 (1973).
[CrossRef] [PubMed]

Benner, D. C.

Cappellani, F.

Chudamani, S.

P. Varanasi, S. Chudamani, S. Kapur, “Diode Laser Measurements of CO Line Widths at Planetary Atmospheric Temperatures,” J. Quant. Spectrosc. Radiat. Transfer 38, 167 (1987).
[CrossRef]

S. Chudamani, P. Varanasi, “Measurements on 4.7 μm CH3D Lines Broadened by H2 and N2 at Temperatures Relevant to Planetary Atmospheres,” J. Quant. Spectrosc. Radiat. Transfer 38, 179 (1987).
[CrossRef]

P. Varanasi, S. Chudamani, “Tunable Diode Laser Measurements of Collision-Broadened Line Widths in the ν4-Fundamental Band of 12CH4 at Low Temperatures,” J. Quant. Spectrosc. Radiat. Transfer (in press).

Devi, V. M.

Farmer, C. B.

R. Beer, C. B. Farmer, R. H. Norton, J. V. Martonchik, T. G. Barnes, “Jupiter: Observation of Deuterated Methane in the Atmosphere,” Science 175, 1360 (1972); R. Beer, F. W. Taylor, “The Abundance of CH3D and the D/H Ratio in Jupiter,” Astrophys. J. 179, 309 (1973).
[CrossRef] [PubMed]

Gentry, B.

T. D. Wilkerson, G. Schwemmer, B. Gentry, L. P. Giver, “Intensities and N2 Collision-Broadening Coefficients Measured for Selected H2O Absorption Lines Between 715 and 732 nm,” J. Quant. Spectrosc. Radiat. Transfer 22, 315 (1979).
[CrossRef]

Giver, L. P.

T. D. Wilkerson, G. Schwemmer, B. Gentry, L. P. Giver, “Intensities and N2 Collision-Broadening Coefficients Measured for Selected H2O Absorption Lines Between 715 and 732 nm,” J. Quant. Spectrosc. Radiat. Transfer 22, 315 (1979).
[CrossRef]

Hanel, R.

R. Hanel et al., “Infrared Observations of the Saturnian System from Voyager 2,” Science 215, 544 (1982).
[CrossRef] [PubMed]

R. Hanel et al., “Infrared Observations of the Saturnian System from Voyager 1,” Science 212, 192 (1981).
[CrossRef] [PubMed]

R. Hanel et al., “Infrared Observations of the Jovian System from Voyager 1,” Science 204, 972 (1979).
[CrossRef] [PubMed]

R. Hanel et al., “Infrared Observations of the Jovian System from Voyager 2,” Science 206, 952 (1979).
[CrossRef] [PubMed]

Hanel, R. A.

V. G. Kunde, A. C. Aiken, R. A. Hanel, D. E. Jennings, W. C. Maguire, R. Samuelson, “C4H2, HC3N and C2N2 in Titan’s Atmosphere,” Nature London 292, 686 (1981).
[CrossRef]

Jennings, D. E.

V. G. Kunde, A. C. Aiken, R. A. Hanel, D. E. Jennings, W. C. Maguire, R. Samuelson, “C4H2, HC3N and C2N2 in Titan’s Atmosphere,” Nature London 292, 686 (1981).
[CrossRef]

D. E. Jennings, “Absolute Line Strengths in ν4, 12CH4: a Dual-Beam Diode Laser Spectrometer with Sweep Integration,” Appl. Opt. 19, 2695–2700 (1980).
[CrossRef] [PubMed]

Kapur, S.

P. Varanasi, S. Chudamani, S. Kapur, “Diode Laser Measurements of CO Line Widths at Planetary Atmospheric Temperatures,” J. Quant. Spectrosc. Radiat. Transfer 38, 167 (1987).
[CrossRef]

Kunde, V.

V. Kunde et al., “The Tropospheric Gas Composition of Jupiter’s North Equatorial Belt (NH3,PH3,CH3D,GeH4,H2O) and the Jovian D/H Isotopic Ratio,” Astrophys. J. 263, 443 (1982).
[CrossRef]

Kunde, V. G.

V. G. Kunde, A. C. Aiken, R. A. Hanel, D. E. Jennings, W. C. Maguire, R. Samuelson, “C4H2, HC3N and C2N2 in Titan’s Atmosphere,” Nature London 292, 686 (1981).
[CrossRef]

Lacome, N.

Longbothum, R. L.

J. J. Olivero, R. L. Longbothum, “Empirical Fits to the Voigt Line Width: A Brief Review,” J. Quant. Spectrosc. Radiat. Transfer 17, 233 (1977).
[CrossRef]

Maguire, W. C.

V. G. Kunde, A. C. Aiken, R. A. Hanel, D. E. Jennings, W. C. Maguire, R. Samuelson, “C4H2, HC3N and C2N2 in Titan’s Atmosphere,” Nature London 292, 686 (1981).
[CrossRef]

Martonchik, J. V.

R. Beer, C. B. Farmer, R. H. Norton, J. V. Martonchik, T. G. Barnes, “Jupiter: Observation of Deuterated Methane in the Atmosphere,” Science 175, 1360 (1972); R. Beer, F. W. Taylor, “The Abundance of CH3D and the D/H Ratio in Jupiter,” Astrophys. J. 179, 309 (1973).
[CrossRef] [PubMed]

Norton, R. H.

R. Beer, C. B. Farmer, R. H. Norton, J. V. Martonchik, T. G. Barnes, “Jupiter: Observation of Deuterated Methane in the Atmosphere,” Science 175, 1360 (1972); R. Beer, F. W. Taylor, “The Abundance of CH3D and the D/H Ratio in Jupiter,” Astrophys. J. 179, 309 (1973).
[CrossRef] [PubMed]

Olivero, J. J.

J. J. Olivero, R. L. Longbothum, “Empirical Fits to the Voigt Line Width: A Brief Review,” J. Quant. Spectrosc. Radiat. Transfer 17, 233 (1977).
[CrossRef]

Penner, S. S.

S. S. Penner, Quantitative Molecular Spectroscopy and Gas Emissivities (Addison-Wesley, Reading, MA, 1959), Chap. 3.

Restelli, G.

Rinsland, C. P.

Samuelson, R.

V. G. Kunde, A. C. Aiken, R. A. Hanel, D. E. Jennings, W. C. Maguire, R. Samuelson, “C4H2, HC3N and C2N2 in Titan’s Atmosphere,” Nature London 292, 686 (1981).
[CrossRef]

Schwemmer, G.

T. D. Wilkerson, G. Schwemmer, B. Gentry, L. P. Giver, “Intensities and N2 Collision-Broadening Coefficients Measured for Selected H2O Absorption Lines Between 715 and 732 nm,” J. Quant. Spectrosc. Radiat. Transfer 22, 315 (1979).
[CrossRef]

Smith, M. A. H.

Thakur, K. B.

Varanasi, P.

S. Chudamani, P. Varanasi, “Measurements on 4.7 μm CH3D Lines Broadened by H2 and N2 at Temperatures Relevant to Planetary Atmospheres,” J. Quant. Spectrosc. Radiat. Transfer 38, 179 (1987).
[CrossRef]

P. Varanasi, S. Chudamani, S. Kapur, “Diode Laser Measurements of CO Line Widths at Planetary Atmospheric Temperatures,” J. Quant. Spectrosc. Radiat. Transfer 38, 167 (1987).
[CrossRef]

P. Varanasi, S. Chudamani, “Tunable Diode Laser Measurements of Collision-Broadened Line Widths in the ν4-Fundamental Band of 12CH4 at Low Temperatures,” J. Quant. Spectrosc. Radiat. Transfer (in press).

Whiting, E. E.

E. E. Whiting, “An Empirical Approximation to the Voigt Profile,” J. Quant. Spectrosc. Radiat. Transfer 8, 1379 (1968).
[CrossRef]

Wilkerson, T. D.

T. D. Wilkerson, G. Schwemmer, B. Gentry, L. P. Giver, “Intensities and N2 Collision-Broadening Coefficients Measured for Selected H2O Absorption Lines Between 715 and 732 nm,” J. Quant. Spectrosc. Radiat. Transfer 22, 315 (1979).
[CrossRef]

Appl. Opt. (3)

Astrophys. J. (1)

V. Kunde et al., “The Tropospheric Gas Composition of Jupiter’s North Equatorial Belt (NH3,PH3,CH3D,GeH4,H2O) and the Jovian D/H Isotopic Ratio,” Astrophys. J. 263, 443 (1982).
[CrossRef]

J. Mol. Spectrosc. (1)

V. M. Devi, D. C. Benner, C. P. Rinsland, M. A. H. Smith, K. B. Thakur, “Diode-Laser Measurements of Intensities and Halfwidths in the ν6 Band of 12CH3D,” J. Mol. Spectrosc. 122, 182 (1987).
[CrossRef]

J. Quant. Spectrosc. Radiat. Transfer (5)

E. E. Whiting, “An Empirical Approximation to the Voigt Profile,” J. Quant. Spectrosc. Radiat. Transfer 8, 1379 (1968).
[CrossRef]

J. J. Olivero, R. L. Longbothum, “Empirical Fits to the Voigt Line Width: A Brief Review,” J. Quant. Spectrosc. Radiat. Transfer 17, 233 (1977).
[CrossRef]

T. D. Wilkerson, G. Schwemmer, B. Gentry, L. P. Giver, “Intensities and N2 Collision-Broadening Coefficients Measured for Selected H2O Absorption Lines Between 715 and 732 nm,” J. Quant. Spectrosc. Radiat. Transfer 22, 315 (1979).
[CrossRef]

S. Chudamani, P. Varanasi, “Measurements on 4.7 μm CH3D Lines Broadened by H2 and N2 at Temperatures Relevant to Planetary Atmospheres,” J. Quant. Spectrosc. Radiat. Transfer 38, 179 (1987).
[CrossRef]

P. Varanasi, S. Chudamani, S. Kapur, “Diode Laser Measurements of CO Line Widths at Planetary Atmospheric Temperatures,” J. Quant. Spectrosc. Radiat. Transfer 38, 167 (1987).
[CrossRef]

Nature London (1)

V. G. Kunde, A. C. Aiken, R. A. Hanel, D. E. Jennings, W. C. Maguire, R. Samuelson, “C4H2, HC3N and C2N2 in Titan’s Atmosphere,” Nature London 292, 686 (1981).
[CrossRef]

Science (5)

R. Hanel et al., “Infrared Observations of the Saturnian System from Voyager 2,” Science 215, 544 (1982).
[CrossRef] [PubMed]

R. Hanel et al., “Infrared Observations of the Jovian System from Voyager 1,” Science 204, 972 (1979).
[CrossRef] [PubMed]

R. Hanel et al., “Infrared Observations of the Jovian System from Voyager 2,” Science 206, 952 (1979).
[CrossRef] [PubMed]

R. Hanel et al., “Infrared Observations of the Saturnian System from Voyager 1,” Science 212, 192 (1981).
[CrossRef] [PubMed]

R. Beer, C. B. Farmer, R. H. Norton, J. V. Martonchik, T. G. Barnes, “Jupiter: Observation of Deuterated Methane in the Atmosphere,” Science 175, 1360 (1972); R. Beer, F. W. Taylor, “The Abundance of CH3D and the D/H Ratio in Jupiter,” Astrophys. J. 179, 309 (1973).
[CrossRef] [PubMed]

Other (3)

S. S. Penner, Quantitative Molecular Spectroscopy and Gas Emissivities (Addison-Wesley, Reading, MA, 1959), Chap. 3.

World Meteorological Organization (WMO), Atmospheric Ozone 1985, Assessment of Our Understanding of the Processes Controlling Its Present Distribution and Change (Global Ozone Research Monitoring Project-Report 16, WMO, Geneva, 1986), p. 98.

P. Varanasi, S. Chudamani, “Tunable Diode Laser Measurements of Collision-Broadened Line Widths in the ν4-Fundamental Band of 12CH4 at Low Temperatures,” J. Quant. Spectrosc. Radiat. Transfer (in press).

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Figures (1)

Fig. 1
Fig. 1

Plot of In γ L 0 vs In T for the qP(4,2,E) line at 1275.1302 cm−1 in the ν3 fundamental band of 12CH3D broadened by H2. The points are experimental data at 131, 228, and 295 K. The slope of the straight line is the exponent n defining the temperature dependence of the linewidth.

Tables (2)

Tables Icon

Table I Collision-Broadened Llnewidths in the ν6 Fundamental of 12CH3D. X in the First Column Denotes the Broadener.

Tables Icon

Table II Collision-Broadened Linewidths in the ν3 Fundamental of 12CH3D. X in the First Column Denotes the Broadener.

Equations (5)

Equations on this page are rendered with MathJax. Learn more.

f ( ν ν 0 ) = A K ( x , y ) ,
A = ( 1 / γ D ) ( ln 2 ) / π , K ( x , y ) = y π exp ( t 2 ) y 2 + ( x t ) 2 d t , y = ( γ L / γ D ) ln 2 x = [ ( ν ν 0 ) / γ D ] ln 2 ,
γ L / γ V = 7 . 7254 6 . 7254 [ 1 + 0 . 3195 ( γ D / γ V ) 2 ] 1 / 2 ,
γ D = 3 . 581 × 10 7 ν 0 T / M .
γ L 0 ( T ) / γ L 0 ( T 0 ) = ( T 0 / T ) n ,

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