Electronic Collimation with Fast Coincidence Technique in Proportional Counters

Abstract

A new method of electronic collimation is reported. The counter is composed of two proportional counters with cathodes arranged end-to-end on a common axis occupied by a common wire anode. The whole is placed in a methane filled envelope. Energy signals taken from the center wire are gated by coincidence signals between the pulses taken from the two cathodes. By such an arrangement only particles which are parallel to the center wire are detected or analyzed. The method is applicable to gas recoil neutron spectrometers and permit the conven-tional collimator to be dispensed with.