Drift velocity and longitudinal diffusion coefficient of electrons in pure ethene

Drift velocity and longitudinal diffusion coefficient of electrons in pure ethene were measured over a wide E/N range from 0.03 to 1000 Td (1 Td = 10-17 V cm2) with a newly constructed electron drift apparatus. The accuracy of the present drift velocity and longitudinal diffusion coefficient was estimated to be ±0.5% and ±3%, respectively. The present results were compared with other two-carbon-atom hydrocarbon molecules with different C-C bonds, ethane and acetylene.