G - Physics – 01 – T
Patent
G - Physics
01
T
358/5
G01T 5/10 (2006.01) G01T 1/02 (2006.01)
Patent
CA 1165472
A B S T R A C T The invention relates to a method for detecting and measuring alpha- emitting substances, such as radon and/or daughter products of radon, by registering nuclear tracks on a detector. By contucting away during measuring any electrostatic field which may have built-up on the detector, there is eliminated the risk of erroneous informa- tion being obtained with respect to the dosage of radiation received. A device in the form of a dosimeter for carrying out the detecting and measuring method is also provided in accordance with the inven- tion. Arranged on or in the immediate vicinity of the registering surface (1) of the detector is an electrically conductive material (2) which at least partially covers the registering surface. In a preferred embodiment, the dosimeter may include at least one ab- sorber (4) arranged between the registering surface and the elec- trically conductive material. The electrically conductive layer suitably has a constant potential and may be connected to the ground or to a source of electric voltage (Fig 4). The present invention provides advance in the art by avoiding the disadvantage common with the use of nuclear radiation registering detectors such as cellulose nitrate, in personal dosimeters, for registering radon and radon daughters, namely that the dosimeter can give erroneous information concerning the dose obtained by the wearer regardless whether the detector is uncovered or covered.
378168
Kristiansson Krister
Malmqvist Erik L.
Boliden Aktiebolag
Gowling Lafleur Henderson Llp
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