Radiation source localization system and method

Abstract

The invention discloses a radiation source positioning system and method. The system comprises a detector, a rotating holder and a collecting and processing center. The detector comprises a thin scintillation crystal, a thin blocking sheet and a photoelectric detector. The thin blocking sheet clings to either of the two largest sides of the thin scintillation crystal, and the photoelectric detector is coupled to any side other than the two largest sides of the thin scintillation crystal. The rotating holder is used for making the detector rotate at a preset speed. The collecting and processingcenter is used for obtaining the angle-counting rate response curve of the detector when the detector rotates 360 degrees through the rotating holder, obtaining the normal of the two largest sides under the maximum counting rate, and obtaining the direction of a radiation source according to the normal direction in which the thin blocking sheet points to the thin scintillation crystal. With the system, the direction of a radiation source can be obtained and the radiation source can be found according to the normal direction in which the thin blocking sheet points to the thin scintillation crystal. The detection sensitivity is improved. The positioning vision is expanded. Blind search is avoided. The efficiency of radiation source search is improved.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a radioactive source positioning system and method. Background technique [0002] With the development of science and technology, radioactive sources are widely used in various fields such as industry, agriculture, medicine, and military affairs, such as food sterilization, non-destructive testing, and radiation therapy. However, due to the high energy of the radioactive source, it can cause ionizing radiation, cause cell disease or damage cell tissue, and even cause harm to the human body, which is very dangerous. Therefore, strict management and monitoring of radioactive sources is required. When radioactive sources are lost, leaked or stolen, it is necessary to quickly search for radioactive sources to reduce their hazards. [0003] In related technologies, gamma dosimeters or spectrometers are used to search for radioactive sources. However, these detecto...

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Problems solved by technology

[0003] In related technologies, gamma dosimeters or spectrometers are used to search for radioactive sources. However, these detectors do not have the ability to locate directions, and require manual, vehicle-mounted, or airborne methods to carry nuclear radiation detectors to carry out blanket searches, resulting in relatively blind detection methods. , the process takes a long time, reduces the efficiency of radioactive source search, and source search personnel are easily exposed to radioactive source radiation at close range, resulting in additional dose exposure

Although detectors with imaging capabilities such as coded plate imaging detectors, collimators for gamma radiation source locators, and Compton cameras have also been developed, these detectors have low detection sensitivity and high cost

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