Measurement of Electron Mobilities in Argon Gas in a Pure Vapor Cloud Chamber

Measurements have been made of the mobilities of electrons in argon gas using pure vapor cloud-chamber techniques. Electron mobilities were measured in the $\frac{E}{P_0}$ range ($P_0$ is the pressure corrected to 296°K) from 7.9 to 11.4 V/cm mm Hg. The electron mobilities were found to be approximately constant over this $\frac{E}{P_0}$ range with a value of $k_0$ of about 3.0×${10}^5$ ${\mathrm{cm}}^2$/vsec mm Hg.