AN EXPERIMENTAL RADON-IN-AIR MONITOR
Technical Report
·
OSTI ID:4139674
An instrument was designed to detect radon in air at or about a level of 10/sup -13/ curies of radon per cm/sup 3/ of air. The 5.5 Mev alpha particle emitted in the decay of radon (/sub 86/Rn/sup 222/) to radium A (/sub 84/ Po/sup 218/) is detected by a large screen scintillation counter. The instrument measures the pulse rate, due to these alpha particles, from the scintillation counter and hence the radon-in-air concentration. The measured sensitivity for 10/sup -13/ curies of radon per cm/sup 3/ of air is 5 counts per second; the background level is less than 0.4 counts per second. The activity level is displayed on a meter in terms of counts per second on successive ranges from 1 to 10/sup 5/ counts per second full scale and facilities are available for operation of a chart recorder. An audible warning circuit is incorporated and this may be set to operate at any convenient level. (auth)
- Research Organization:
- United Kingdom Atomic Energy Authority. Research Group. Atomic Energy Research Establishment, Harwell, Berks, England
- NSA Number:
- NSA-14-019125
- OSTI ID:
- 4139674
- Report Number(s):
- AERE-M-660
- Country of Publication:
- United Kingdom
- Language:
- English
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