Rapid positioning and measuring device for radioactive contamination on human body surface

Abstract

The invention relates to a quick positioning and measuring device for radioactive contamination on human body surface, which comprises a main crystal and a secondary crystal which is sheathed outsidethe main crystal; a light guide, with one end positioned at the end of the main crystal and the secondary crystal and the other end positioned at the end of the photomultiplier tube; a lead shieldinglayer which is sleeved outside the secondary crystal; a photomultiplier tube for converting the weak light signal sent from the light guide into an electrical signal; a magnetic shielding layer sleeved outside the photomultiplier tube; an outer cover is sleeved outside the lead shielding layer and the magnetic shielding layer; a amplifying circuit which is divided into two paths respectively sentto the main channel discriminator circuit and the peak detection circuit, and then accessed into the anti-coincidence circuit; the main crystal signal U2 output by the anti-coincidence circuit and thetotal count signal U1 output by the main channel discrimination circuit are respectively sent to the controller which determines the location of the radioactive contamination by calculation. The invention can rapidly position the radioactive contamination of the human body surface and prevent the interference, and the intelligent multi-function radioactive contamination instrument can be linked quickly and intelligently to realize quick elimination and improve the decontamination efficiency.

Description

technical field [0001] The invention relates to the field of surface radioactive contamination measurement, in particular to a rapid positioning and measurement device for human body surface radioactive contamination. Background technique [0002] The rapid positioning measurement of radioactive contamination on the human body surface is essentially the measurement of surface contamination, so as to realize the rapid positioning of contaminated parts. Due to the strong penetrating power and long range of gamma rays, it is easy to interfere with the detection. Conventional surface pollution gamma detectors cannot distinguish which direction the gamma rays come from, so they cannot accurately locate the contaminated part. The existing surface pollution measurement devices are basically aimed at the measurement of α and β radionuclide pollution. α and β particles have short range and weak penetrating ability. The measurement window must be made of mica or aluminum film with a ...

AI Technical Summary

Problems solved by technology

Due to these limitations, α, β surface contamination measurement devices cannot be dustproof and waterproof

And when the surface pollution is measured at a long distance, the detection efficiency of alpha rays is extremely low

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