HIGH RESOLUTION ABSORPTION CROSS SECTION MEASUREMENTS OF $SO_{2}$ AT 213 K IN THE WAVELENGTH REGION 172-240 nm

Abstract Laboratory measurements at high resolution of the absorption cross section of SO2 at the temperature 213 K have been performed in the wavelength region 172–240 nm with a 6.65 m scanning spectrometer/spectrograph operated at an instrumental width of 0.002 nm. The measured cross sections are presented graphically in representative wavelength regions and are available throughout the region 172–240 nm at wavenumber intervals of 0.4–0.1 cm−1 as a numerical tabulation stored on magnetic tape from the National Space Science Data Center, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, U.S.A. The measured cross sections, which are relevant to the photochemistry of planetary atmospheres, possess significantly more spectroscopic structure, and are more accurate, than previous measurements made at lower resolution.

[1]  R. R. Conway,et al.  Iue detection of sulfur dioxide in the atmosphere of Venus , 1979 .

[2]  H. D. Bist,et al.  Sulfur dioxide: Rotational constants and asymmetric structure of the C̃1B2 state , 1976 .

[3]  J. Brand,et al.  The ?*-? (2350 ) band system of sulphur dioxide , 1972 .

[4]  R. Hudson.  CRITICAL REVIEW OF ULTRAVIOLET PHOTOABSORPTION CROSS SECTIONS FOR MOLECULES OF ASTROPHYSICAL AND AERONOMIC INTEREST. , 1971 .

[5]  P. Warneck,et al.  Ultraviolet Absorption of SO2: Dissociation Energies of SO2 and SO , 1964 .

[6]  K. Yoshino,et al.  High resolution absorption cross section measurements and band oscillator strengths of the (1,0)-(12,0) Schumann-Runge bands of O2 , 1983 .

[7]  Shailendra Kumar.  Photochemistry of SO2 in the atmosphere of Io and implications on atmospheric escape , 1982 .

[8]  S. Wallace,et al.  Quantum interference phenomena in the radiative decay of the C̃(1B2) state of SO2 , 1983 .

[9]  S. Kumar.  A model of the SO2 atmosphere and ionosphere of Io , 1980 .

[10]  R. Hudson,et al.  Absorption cross sections of stratospheric molecules , 1974 .

[11]  Paul Harteck,et al.  Ultraviolet absorption coefficients of CO2, CO, O2, H2O, N2O, NH3, NO, SO2, and CH4 between 1850 and 4000 A , 1963 .

[12]  A. Krueger,et al.  Sighting of El Chich�n Sulfur Dioxide Clouds with the Nimbus 7 Total Ozone Mapping Spectrometer , 1983, Science.

[13]  W. Jaeschke,et al.  Preliminary results of stratospheric SO2‐measurements , 1976 .

[14]  J. R. Esmond,et al.  High resolution absorption cross-section measurements of ozone at 195 K in the wavelength region 240–350 nm , 1984 .

[15]  L. Esposito,et al.  Ultraviolet Spectroscopy of Venus: Initial Results from the Pioneer Venus Orbiter , 1979, Science.

[16]  D. Judge,et al.  SO2 and CS2 cross section data in the ultraviolet region. [Venus and Io atmospheric spectra] , 1981 .

[17]  D. E. Freeman,et al.  Photoelectric scanning (6.65-m) spectrometer for VUV cross-section measurements. , 1980, Applied optics.

[18]  M. Belton.  An interpretation of the near-ultraviolet absorption spectrum of SO2 - Implications for Venus, Io, and laboratory measurements , 1982 .

[19]  D. Golomb,et al.  Absorption Coefficients of Sulfur Dioxide in the Vacuum Ultraviolet , 1962 .

[20]  E. Sagawa,et al.  Mass spectrometric observation of SO2 in the stratosphere , 1977 .

[21]  E. Barker.  Detection of SO2 in the UV spectrum of Venus , 1978 .

[22]  W. M. McClain,et al.  Two-photon excitation of the C~1B2 state of sulfur dioxide , 1981 .