Content - Quantum Yields for Production of O(1D)

Quantum Yields for Production of O(1D) in the Ultraviolet Photolysis of Ozone

Recommendation based on evaluation of laboratory data. Database used for the evaluation in Matsumi, Y., F. J. Comes, G. Hancock, A. Hofzumahaus, A. J. Hynes, M. Kawasaki, and A. R. Ravishankara, (2002).

 The quantum yield for O(1D) production in the photolysis of ozone in the ultraviolet region as a function of wavelength and temperature is a key input for modeling calculations in the atmospheric chemistry. To provide the modeling community with the best possible information, the available data are critically evaluated and the best possible recommendation for the quantum yields are presented. Since the authors of this paper are the principal investigators of the groups which have provided the most of the recent experimental data for the O(1D) quantum yields, the basic assumptions made by each group, the input parameters used in obtaining the quantum yields, and possible sources of systematic errors are well examined. The fitting expression of the O(1D) yield as a function of photolysis wavelength and temperature T is presented in the ranges of 306 nm < λ <328 nm and 200 K< T<300 K. The recommendation values of the O(1D) quantum yield for 290 nm < λ < 306 nm and 328 nm < λ < 350 nm are also presented.

The following tables and figures show the data used in the evaluation of the quantum yield for O(1D) production in the photolysis of ozone. For a more detailed discussion please refer to Matsumi et al. (2002).

Index to Tables and Figures

  1. Table of the recommendation values of the O(1D) in the photolysis of ozone at various temperatures and photolysis wavelengths.
  2. Fitting expression for the recommendation values of the O(1D) in the photolysis of ozone as a function of temperature and photolysis wavelength.
  3. Plots of the fitting expression at various temperatures.
  4. Table of the O(1D) yield values at room temperature (298 K) which were used in the evaluation.
  5. Plots of the room temperature (298 K) values, which show all the experimental data used, derived average values and the curve obatined from the fitting expression.
  6. Table of the O(1D) yield values at various temperatures which were used in the evaluation.
  7. Plots the low temperature (227 K) values, which show the experimental data used and the curve obatined from the fitting expression.
  8. Table of the O(1D) quantum yields at 308 nm at various temperatures.
  9. Plots of the O(1D) quantum yields at 308 nm versus temperature.
  10. Inter-comparison of the power meters used by the Japanese group (Takahashi et al., 1996a, 1998a) and NOAA group (Talukdar et al., 1998) to test if the measurements of relative laser fluence as a function of wavelength was a source of error.
  11. Lists of the references to the papers from which data were taken.