Radiant energy – Geological testing or irradiation
Patent
1981-05-27
1983-11-22
Willis, Davis L.
Radiant energy
Geological testing or irradiation
2504721, G01V 500
Patent
active
044171420
ABSTRACT:
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 conducting away during measuring any electrostatic field which may have built-up on the detector, there is eliminated the risk of erroneous information 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 invention. 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 absorber (4) arranged between the registering surface and the electrically 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).
REFERENCES:
patent: 3665194 (1972-05-01), Alter et al.
patent: 4053772 (1977-10-01), Felice
patent: 4156138 (1979-05-01), Felice
Kristiansson Krister
Malmqvist Erik L.
Boliden Aktiebolag
Willis Davis L.
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