Calculation of gas-kinetic radius and van der Waals coefficient from electron scattering cross-sections

Abstract

The gas-kinetic radius (r) and van der Waals coefficient (b) are two usable quantities for characterizing the motion of any molecules in the gas phase. In this article, comprehensive calculations of r and b of various environmentally sensitive molecules like SF6, NF3, GeF4, Si2H6 and Cl2O are reported. In the present study, an analytical approach for calculations of r and b was used from the electron impact cross-sections data of these molecules. In general, the reported values of r and b shows good agreement with the previous theories and experiments.