Method, device and system for radioactive source positioning

Abstract

The invention discloses a method, a device and a system for radioactive source positioning. The method comprises the steps of acquiring a relation between a crystal count ratio in a crystal array of a detector and the radioactive source angle according to analog data; measuring the actual crystal count of the crystal array when the radioactive source under test radiates rays; acquiring a plurality of denoising crystal count ratios according to the actual crystal count and the various count noises within a variation range of count noises, acquiring actual radioactive source angles corresponding to the denoising crystal count ratios according to the relation between the crystal count ratio and the radioactive source angle, and selecting the actual radioactive source angle when the count noises are optimum as the radioactive source angle of the radioactive source under test. The device comprises a processing module, a measuring module and a calculating module. The system comprises a radioactive source positioning device, the radioactive source under test and the detector. According to the invention, the crystal count ration is adopted to act as a calculation parameter, effectively noise deducting technologies are adopted, and the sensitivity and the accuracy of radioactive source positioning are improved.

Description

technical field [0001] The invention relates to radioactive source detection technology, in particular to a radioactive source positioning method, device and system. Background technique [0002] Radioactive source detection can be widely used in various radioactive environments, such as laboratories, nuclear power plants, nuclear fuel plants, large heavy ion accelerators, radioactive source libraries, etc. There are many kinds of detectors used to detect gamma rays. The current more advanced technology is to use the principle that the particles in gamma rays can be absorbed by cesium iodide (CsI) or bismuth germanate (BGO) and other crystals, using four The crystals form a 2×2 crystal array to detect and count the same radioactive source, and deduce the angle of the radioactive source according to the count value of each crystal to determine the orientation of the radioactive source. [0003] However, when the position of the radioactive source is not on the same plane as ...

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Problems solved by technology

[0003] However, when the position of the radioactive source is not on the same plane as the crystal array, the calculated radioactive source angle is not accurate enough, which makes the positioning accuracy low; at the same time, because the crystal count value does not change significantly with the angle, the existing radioactive source The sensitivity of the positioning method is not high, and the resolution is low

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