New Approach to Analysis of the Data of Electron Swarm Experiment in Ionization Chamber

Abstract

The electron swarm method for studying electron attachment processes usually consists of monitoring the rate of electron disappearance from the swarm as a function of density-reduced electric field, E/N. the swarm of electrons produced by an α-particle drifts under the influence of a uniform electric field to a positive collector plate. the electrode is connected to a linear pulse amplifier. the amplified output pulse is registered in a multichannel analyzer. the pulse height is a function both of drift velocity, W, and electron capture rate constant, k. From its dependence on E/N the k value can be determined^1-3. This method, while effective, uses rather complicated equations to fit simultaneously the electron drift velocity and the electron capture rate constant. Moreover, it is rather time-consuming as one needs a good statistics to determine accurately the pik height for each E/N.