Process and device for determining the spatial distribution of electrons emerging from the surface of a radioactive body
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United States of America Patent
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Jul 16, 1991
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N/A
app pub date -
Oct 18, 1989
filing date -
Oct 18, 1989
priority date (Note) -
Expired
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Abstract
A device according to the invention includes: a gas detector, comprising at least one chamber (2) and containing a noble gas and a gas or vapor that emits photons between two parallel electrodes (3a, 3b) between which a continuous high voltage (HT) is applied, whereby a first electrode (3a) is intended for receiving, against its external face, the surface of the radioactive body (5,6) to be observed; a brilliance amplifier (13) arranged for receiving the photons emitted by the excited atoms which are produced in the vicinity of a second electrode (3b) by the electron avalanche ascribable to the electrical field between the first and second electrodes; a camera (12) arranged behind the brilliance amplifier; and computing means (15) capable of computing, from the output signal of the camera, the entrance points (9) in said gas detector, at the first electrode, of the electrons emerging from said surface of the radioactive body.
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