The mobility of charges photo-injected into a liquid dielectric

A method has been developed for measuring the transit times of charges injected into a dielectric while maintaining a stationary average current. This has enabled estimates of the mobility of photo-injected charges in n -hexane to be made over a range of nearly three decades of power input. Absence of any dependence of apparent mobility upon power suggests that liquid motion is not a significant factor in the transport of charges at the level of injection normally associated with this technique. The value of mobility obtained is (7·5 ± 1·0) × 10 −4 cm 2 V −1 S −1 , close to that obtained by Swan who used a similar injection technique.