Temperature and third-body dependence of the rate constant for the reaction O + O2 + M yields O3 + M
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Lin, C. L.↗
Engineering topics
Lin, C. L.
Publications and source records attributed to Lin, C. L..
Band analysis by spectral curve fitting
A method of estimating the values of the parameters in the models describing the positions, widths, and intensities of the lines in rotation-vibration bands of gases, without the need for line by line analysis, is described. To illustrate the technique, portions of the 1-0 bands of HCl and CO have been analyzed. The values of up to 27 parameters, their standard deviations, and the correlations between the parameters required to describe the spectra have been obtained.
Lin, C. L.↗
Rate constants for the reactions of OH with ClO, Cl2, and Cl2O at 298K
Recent concern about the depletion of stratospheric ozone by chlorine species from the decomposition of chlorofluoromethanes has emphasized the need for laboratory studies of the first reaction steps involved, especially those which control the concentration of the OH and ClO radicals in the stratosphere. Rate constants for the reactions of OH with ClO, Cl2, and Cl2O at 298 K have been determined in a discharge flow system using resonance fluoresence detection. The results are (9.1 + or - 1.3) x 10 to the -12th, (5.5 + or - 0.3) x 10 to the -14th, and (6.5 + or - 0.5) x 10 to the -12th (all in units of cu cm/sec), respectively.
Leu, M. T.↗
Rate constant for the reaction of atomic chlorine with methane
The rate constant and temperature dependence of the Cl + CH4 reaction have been investigated by the techniques of competitive chlorination of CH4/C2H6 mixtures and by discharge-flow/mass spectroscopy. The objectives were to determine an accurate value for the rate constant for use in stratospheric modeling, and to clarify discrepancies in results previously obtained by different techniques. The results deduced from the competitive chlorination study are in good agreement with the absolute values measured by the mass spectrometric method, and at temperatures above 300 K are in good agreement with measurements by other techniques based on resonance fluorescence detection of atomic chlorine. However, in the 220-300 K region, the competitive experiments indicate lower rate constants than those obtained by resonance fluorescence methods, and do not reproduce the curved Arrhenius plots seen in some of those studies.
Lin, C. L.↗
Ultraviolet absorption cross sections of hydrogen peroxide
Absorption cross-sections of hydrogen peroxide vapor and of neutral aqueous solutions of hydrogen peroxide were measured in the wavelength range from 195 to 350 nm at 296 K. The spectrophotometric procedure is described, and the reported cross-sections are compared with values obtained by other researchers. Photodissociation coefficients of atmospheric H2O2 were calculated for direct absorption of unscattered solar radiation, and the vertical distributions of these coefficients are shown for various solar zenith angles.
Lin, C. L.↗
Rate constant for formation of chlorine nitrate by the reaction ClO + NO2 + M
The pseudo-first-order decay of ClO in a large excess of NO2 was monitored in a discharge flow/mass-spectrometer apparatus in order to measure the rate constant of the reaction ClO + NO2 + M yields ClONO2 + M for M = He, Ar, and N2 over the temperature range from 248 to 417 K. Numerical results are given for He at 248, 299, 360, and 417 K (1 to 9 torr); for Ar at 298 K (1 to 4 torr); and for N2 at 299, 360, and 417 K (1 to 6 torr). Systematic errors are estimated, and identification of the reaction product is discussed. The results obtained are shown to be in excellent agreement with other recent measurements of the same rate constant.
Leu, M. T.↗