Compton effect thermally activated depolarization dosimeter

Details Compton effect thermally activated depolarization dosimeter Compton effect thermally activated depolarization dosimeter

1975-07-23

1978-04-04

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

250337, 250395, G01T 100

Patent

active

040829510

ABSTRACT:
A dosimetry technique for high-energy gamma radiation or X-radiation employs the Compton effect in conjunction with radiation-induced thermally activated depolarization phenomena. A dielectric material is disposed between two electrodes which are electrically short circuited to produce a dosimeter which is then exposed to the gamma or X radiation. The gamma or X-radiation impinging on the dosimeter interacts with the dielectric material directly or with the metal composing the electrode to produce Compton electrons which are emitted preferentially in the direction in which the radiation was traveling. A portion of these electrons becomes trapped in the dielectric material, consequently inducing a stable electrical polarization in the dielectric material. Subsequent heating of the exposed dosimeter to the point of onset of ionic conductivity with the electrodes still shorted through an ammeter causes the dielectric material to depolarize, and the depolarization signal so emitted can be measured and is proportional to the dose of radiation received by the dosimeter.

REFERENCES:
patent: 3450879 (1969-06-01), Seppi
patent: 4016422 (1977-04-01), Moran et al.

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