Process and apparatus for detecting atmospheric contamination by

Details Process and apparatus for detecting atmospheric contamination by Process and apparatus for detecting atmospheric contamination by

1984-06-08

1986-08-19

Fields, Carolyn E.

Radiant energy

Fluent material containment, support or transfer means

With irradiating source or radiating fluent material

250380, 250370, G01T 116

Patent

active

046071652

ABSTRACT:
Process for the detection of atmospheric contamination by alpha particle aerosols eliminating the background noise due to radon daughter nuclei, of the type consisting of collecting, by circulation of the atmospheric air, the alpha particles to be detected on a filter placed in front of a detection and counting system, wherein there is discrimination between the alpha particles present in the atmosphere coming from a polluting source and which it is wished to detect and count and the alpha particles constituting the background noise and which are normally present in the atmosphere, on the basis of their different grain sizes. The invention also relates to a portable detector for performing the aforementioned process. Application to monitoring the ambient air of laboratories, etc.

REFERENCES:
patent: 4055762 (1977-10-01), Durkin
patent: 4132894 (1979-01-01), Yule
patent: 4277682 (1981-07-01), Madelaine et al.
IEEE Transactions on Nuclear Science, vol. NS-23, No. 3, Jun. 1976, New York (US) H. F. Schulte: "Current Technology in Sampling for Airborne Radionuclides", pp. 1197-1201 * en entier *.

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