G - Physics – 01 – V
Patent
G - Physics
01
V
358/5
G01V 5/02 (2006.01) G01V 5/00 (2006.01)
Patent
CA 1172773
A B S T R A C T The invention relates to a method of measuring the concentration of radon and radon daughters in the ground, particularly at great depth and/or below the ground-water level. In accordance with the invention a detector (11) is freely suspended from a wire (12) and placed in a container (10) intended for collecting gas rising up from the ground. The container (10) is buried at a desired depth beneath the surface of the ground and the detector (11) is exposed to the gas in the container over a given period of time. Subsequent to this exposure period, the detector (11) is drawn up by means of the wire (12), together with a sleeve (14), protecting the detector from contact with surrounding ground, through the roof of the container and up through the ground, to a location so selected that the registered contents of radon and radon daughters can then be determined on the basis of the data registered on the detector. The invention also relates to preferred apparatus for carrying out the method.
387144
Kristiansson Krister
Malmqvist Erik L.
Boliden Aktiebolag
Gowling Lafleur Henderson Llp
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