The intensity of radiation of high energy particles or photons is usually measured by allowing these radiations to ionize the gas molecules in a gas-filled chamber (3). The ions are collected on electrodes and the ion current indicates the intensity of the radiation. Single fast particles give a sharp pulse of ion current. Attempts have been made to use solid bodies in place of the gas-filled chamber (7, 12, 14). The radiation ionizes the solid in a manner similar to that for the gas. Because of its high energy a single particle creates in the crystal a large number of freely moving electrons and positive holes. These electrons and positive holes move without any simultaneous transport of atoms. Hence, the rise time of the electrical pulse obtained from a crystal can be one hundred times less than that of the corresponding pulse created by a single particle in a gas-filled chamber. Because a crystal conduction counter has such an extremely fast counting mechanism, various types of crystals are being investigated for possible use. We have investigated the counting properties of diamond in some detail.
Proceedings of the Iowa Academy of Science
©1950 Iowa Academy of Science, Inc.
Willardson, Robert K.
"Diamond Conduction Counters,"
Proceedings of the Iowa Academy of Science, 57(1), 337-346.
Available at: https://scholarworks.uni.edu/pias/vol57/iss1/43