Measurement of the diffusion coefficient of atomic chlorine in molecular chlorine

The technique for measuring the diffusion coefficients of reactive atomic species through their radiative recombination reactions is applied to multicomponent mediums. A series of diffusion coefficients of chlorine atoms in chlorine molecules mixed with rare gases M(He, Ne, Ar, Kr, and Xe) were measured for various Cl2 and M mole fractions. By extrapolating to zero molecular chlorine pressure, the diffusion coefficients of chlorine atoms in rare gases were obtained. The measured values of the diffusion constant are DCl–He =0.75±0.12, DCl–Ne =0.32±0.05, DCl–Ar =0.19±0.03, DCl–Kr =0.14±0.02, and DCl–Xe =0.12±0.02 cm2/s, respectively, at 296 K and 1 atm rare gas pressure. The corresponding hard sphere collision diameter of chlorine atoms in rare gases was calculated and a comparison was made between the diffusion coefficients of Cl–rare gas and Ar–rare gas systems at 296 K.

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Measurements of the diffusion coefficients of atomic bromine in rare gases

Hwang

Jiang

1989

The Journal of Chemical Physics

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The laser-photolysis-recombination-luminescence-detection method was employed to measure the diffusion coefficients of Br–rare-gas systems. The measured values are DBr–He=0.66 ±0.11, DBr–Ne=0.25±0.04, DBr–Ar=0.16±0.03, DBr–Kr=0.12±0.02, and DBr–Xe =0.086±0.015 cm2/s, respectively, at 1 atm and 300 K. Also, the diffusion coefficient of Br–Br2 was measured to be 0.065±0.011 cm2/s. A comparison was made with the results calculated from the potential curves obtained by the crossed molecular beam experiments for the Br–Ar, Br–Kr, and Br–Xe systems, and with the datum of Br–Ar measured by the time resolved–mass spectrometry. The extent of the similarity of the diffusion constants between the Kr–rare-gas systems and the Br–rare-gas systems was discussed over the temperature range of 250K to 1050 K.

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Measurement of the diffusion coefficient of atomic chlorine in molecular chlorine

Cited by 5 publications

References 14 publications

Electron Interactions with Cl2, CCl2F2, BCl3, and SF6

Electron Interactions with Cl2, CCl2F2, BCl3, and SF6

Measurements of the diffusion coefficients of atomic chlorine in rare gases

Measurements of the diffusion coefficients of atomic bromine in rare gases

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