Radiant energy – Invisible radiant energy responsive electric signalling – With heating of luminophors
Patent
1982-01-04
1985-03-19
Howell, Kyle L.
Radiant energy
Invisible radiant energy responsive electric signalling
With heating of luminophors
2504841, 128653, G01T 100
Patent
active
045061572
ABSTRACT:
Three dosimeter disks of a thickness increasing towards the base piece which is to lie against the skin are used, with a covering of .beta. ray window for thermoluminescence dosimetry. In order to provide dosimetry referred to a 70 um depth of living tissue, corresponding to a weight of material per unit area of 7 mg/cm.sup.2, it is found that the thermoluminescent dosimeter (TLD) disk, which is next to the .beta. window, should have a weight per unit area in the range from 15 to 30 mg/cm.sup.2. A three-disk dosimeter should have TLD disks of increasing weight per unit area in the ratio 1:3:7 or, at any rate, the weight of the middle disk should be in the range from 30 to 90 mg/cm.sup.2, and the third disk should have a weight of at least 90 mg/cm.sup.2. TLD's are conventionally made of LiF crystals embedded in PTFE.
REFERENCES:
patent: 3790783 (1974-02-01), Brunskill et al.
patent: 3932758 (1976-01-01), Burghardt et al.
patent: 3983717 (1976-10-01), Collica et al.
patent: 4286165 (1981-08-01), Jones et al.
patent: 4321287 (1982-03-01), Minamide et al.
K. Becker and Scharmann, "Einfuehrung in die Festkoerperdosimetrie", Verlag Thiemid, Muenchen, (1975), general background.
Gyoergy Uchrin, "A New Type of Extremity Dosimeter", Nuclear Instruments and Methods 175, (1980), pp. 173-175.
Howell Kyle L.
Jaworski Francis J.
Kernforschungsanlage Julich GmbH
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