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A MONITOR FOR AIRBORNE TRITIUM

Technical Report ·
OSTI ID:4164949
A monitor was designed which is suitable for the measurement of concentrations of tritium in air in the presence of a fluctuating background of gamma radiation. The monitor uses a pair of compensated ion chambers and operates satisfactorily in gamma -radiation fields of several milliroentgens per hour without the use of shielding. The monitor consists of a pair of symmetrical ionization chambers with the common collector electrode connected to an electrometer d-c amplifier. Room air, after passing through a dust filter and an ion trap, is drawn through one ion chamber which responds to background gamma radiation plus gaseous radioactivity while the other ion chamber being sealed from the surrounding air responds only to background gamma radiation. Because of the opposite polarization of the two chambers, the d-c amplifier measures only the net ionization contribution from the gaseous radioactivity. (W.L.H.)
Research Organization:
Atomic Energy of Canada Ltd., Chalk River, Ont.
NSA Number:
NSA-14-023012
OSTI ID:
4164949
Report Number(s):
CRRD-858; AECL-1049
Country of Publication:
Canada
Language:
English

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