Method and apparatus for continuously determining gas-carried al

Details Method and apparatus for continuously determining gas-carried al Method and apparatus for continuously determining gas-carried al

1989-07-25

1990-10-02

Howell, Janice A.

Radiant energy

Fluent material containment, support or transfer means

With irradiating source or radiating fluent material

250255, 25037002, 25037003, G01T 124, G01T 100

Patent

active

049609980

ABSTRACT:
A method and apparatus for the continuous determination of gas-carried alpha activity caused by the decay of thorium, uranium, plutonium and their decay products. In this method, the gas-carried alpha activity from the decay chains of radon 220 and/or radon 222 is subtracted from the total gas-carried alpha activity. The alpha activity from radon 220 and/or radon 222 is measured after an absorber which only transmits the alpha rays of polonium 212 or of polonium 212 and polonium 214.

REFERENCES:
patent: 4177378 (1979-12-01), Stevens
patent: 4186303 (1980-01-01), Smith et al.
patent: 4868386 (1989-09-01), Ilmasti

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