Fast and slow electrons in liquid argon and nitrogen mixtures

Fast and slow electron current signals in N₂/Ar liquid mixtures have been observed. From the fast signal, the drift velocity and lifetime of delocalized electrons in the liquid with N₂ mol fractions X (= N₂/(N₂ + Ar)) ranging from 5 to 20 mol% were obtained for field strengths E between 5 and 45 kV/cm. The electron mobility for X = 15 mol% is estimated to be ~20 cm²/Vs. The slow signal has shown that the mobility in X = 10 mol% liquid is ~10^-3 cm²/Vs, which is the same order of magnitude as that (~2.5 × 10^-3cm²/Vs) in liquid N₂. Characteristics of the localized electrons are discussed