Portable Contamination Monitor with a Numerical Display

摘要

A portable contamination monitor, its performance and application are described. The monitor is equipped with two 15.5 cm exp 2 'pancake' type Geiger-Mueller counters with thin windows (<2 mg/cm exp 2 ). The summed counting rate is displayed in the range 0.2000 counts/s on a liquid crystal digital voltmeter. Every tenth pulse is signaled by flashing an LED and emitting a short (0.1 s) pulse of sound. The efficiencies for detecting a variety of alpha -, beta - and gamma - emitters have been measured and are reported. Data on the effects of varying battery voltage and temperature are also reported. (Atomindex citation 12:613505)