Gamma ray scanning imaging and radionuclide identification system and method thereof

Abstract

The invention belongs to the technical field of radioactivity monitoring, and in particular relates to a γ-ray scanning imaging and nuclide identification system and method thereof, comprising an outer casing arranged on a Y-axis turntable, the Y-axis turntable is arranged on the X-axis turntable, and the Y-axis turntable is driven to drive the Y-axis turntable. , the motor driver of the X-axis turntable, the probe with a tungsten shielding shell arranged in the outer casing, the multi-channel analyzer connected with the probe, which also includes a collimator that can be replaced, one end of the collimator is connected to the probe, and there is A collimation hole with a specific collimation angle; a camera and a laser range finder arranged in the outer casing and close to the probe, the axis of the lens of the camera and the laser emitted by the laser range finder are parallel to the axis of the collimation hole; also includes a connection motor The motion control card of the driver connects and controls the camera, laser rangefinder, multi-channel analyzer and the internal computer of the motion control card; it has the advantages of large scanning range, fast scanning speed, and can calculate the actual dose value of each point in the measured area .

Description

technical field [0001] The invention belongs to the technical field of radiation monitoring, and in particular relates to a gamma-ray scanning imaging and nuclide identification system and method thereof. Background technique [0002] In the fields of storage and transportation of radioactive sources, nuclear waste treatment, anti-terrorism, radioactive detection of goods at transportation ports, environmental radiation pollution monitoring, nuclear power plant and reactor detection, radioactive laboratory and medical department detection, it is necessary to be able to detect radioactively contaminated areas in a timely and rapid manner. Nuclide identification is also required to provide a basis for the location, search and subsequent disposal of radioactive materials. [0003] Commercial gamma-ray real-time imaging acquisition systems (gamma cameras) have been put into the market abroad, but the performance indicators are quite different, and there are few products with nuc...

AI Technical Summary

Problems solved by technology

Existing radiography systems mostly use the structure of coded plate or pinhole collimator (small hole imaging) plus position sensitive detector. This method has three disadvantages: first, the imaging angle of view is small, generally at 30 Between °~40°

Second, the signal-to-noise ratio of the gamma radiation image reconstructed under the condition of low radiation dose is relatively poor, and the measurement time is required to be long; third: because there is no corresponding distance measuring device, the approximate dose of the contaminated part cannot be given rates, causing significant uncertainty in field assessments

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