Experiments in the Possibility of Increasing the Efficiency of Gamma-Counters

Abstract

The efficiency of G‐M tubes for recording γ‐quanta is increased by insertion of concentric ring systems of metal between the wire and the cylinder. When the ring systems get suitable voltages, good plateaus and resolving times are obtained. The efficiency of a counter, which had 3 ring systems with 24 rings in each system, was 2.5 times that of a conventional counter of the same size. This means an increase of 6 times in γ—γ‐coincidence measurements. The efficiency of an improved tube (see note added in proof) is 3.2 times that of a conventional counter.