G - Physics – 01 – T
Patent
G - Physics
01
T
358/1
G01T 1/20 (2006.01) G01T 1/178 (2006.01) G01T 7/02 (2006.01)
Patent
CA 1128216
- 21 - SAMPLER AND CELL FOR RADON DETECTORS AND METHOD OF USING SAME ABSTRACT OF THE DISCLOSURE A relatively small diameter, relatively deep hole is made in the ground and a sampler tube is inserted there- in. An acetate sleeve is detachably inserted into a cham- ber on the upper end of the sampling tube and the sampler is left for at least sixteen hours and preferably longer in order to permit radon gas to migrate up the tube. Daugh- ter products of radon deposit on the acetate film which is then placed in a scintillation cell attached to the count- ing chamber of a scintillation counter, which counts the alpha emissions of the daughter products thereby permitting the amount of radon gas to be calculated. This method redu- ces considerably any contamination of the scintillation counting chamber so that cleansing is not necessary thus permitting a much higher level of productivity. The system is also totally insensitive to thoron so that no correction for thoron signals is required. The same method can be used to collect airborne samples by hanging the acetate strip in a desired location for at least four hours and countaing al- pha emissions from said strip as above.
346922
Ade & Company
Powell Brian
LandOfFree
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