Mobilities of Cesium Ions in Cesium

Abstract

Measurements have been made of the mobilities of cesium ions using a pulsed-discharge technique. In the present studies two ionic species were observed; however, over the entire $\frac{E}{p_0}$ and $p_0$ range investigated the "fast" ion type was dominant. The present values are compared with the available theoretical values and also previous experimental results. From the comparison we tentatively identify the dominant ion as being ${\mathrm{Cs}}_2^{+}$; the less frequently observed ion is believed to be ${\mathrm{Cs}}^{+}$. The normalized mobility values corresponding to a gas density of 2.69×${10}^{19}$ atoms/cc for ${\mathrm{Cs}}^{+}$ and ${\mathrm{Cs}}_2^{+}$ are 0.075 and 0.21 ${\mathrm{cm}}^2$/V sec, respectively, over the temperature range of approximately 579-679°K.