Device and method for radioactive surface source to automatically imitate and mark gas source detection efficiency

A technology of detection device and detection method, which is applied to measurement device, radiation measurement, X/γ/cosmic radiation measurement, etc., can solve the problems of passive calibration, large error surface source calibration, etc., so as to reduce refrigeration equipment and save production costs. Effect

CN103364818AActive Publication Date: 2013-10-23NORTHWEST INST OF NUCLEAR TECH

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Patent Information

Authority / Receiving Office: CN · China
Current Assignee / Owner: NORTHWEST INST OF NUCLEAR TECH
Publication Date: 2013-10-23

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Abstract

The invention relates to a device and method for a radioactive surface source to automatically imitate and mark gas source detection efficiency. The device comprises a radioactive source tray, at least two supporting columns, at least two sleeve pipes, a base, air leakage holes, a surface source and a CZT detector. The middle of the radioactive source tray is hollow, the lower bottom face of the radioactive source tray is fixedly connected with the at least two supporting columns, the middle of the base is hollow, the upper top face of the base is fixedly connected with the sleeve pipes, the supporting columns and the sleeve pipes are equal in number and corresponding in position in a one-to-one mode, and the external diameter of each supporting column is precisely equal to the internal diameter of each sleeve pipe. According to the device and method for the radioactive surface source to automatically imitate and mark the gas source detection efficiency, the gravity of the radioactive source tray and the gravity of the supporting columns are simply used as a power source without the help of other external forces, the surface source can automatically mark a gas source, a closed space formed by the supporting columns and the sleeve pipes is used, one air leakage hole is formed in the space to be used for air exhaust, and meanwhile, the influence of the air leakage hole to the decline of the tray and the supporting columns is eliminated due to the fact that the air leakage hole is formed in the base.

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Description

technical field

[0001] The invention relates to a gas source detection efficiency calibration technology in the application field of nuclear technology. It specifically relates to a surface source calibration device for measuring the detection efficiency of a radioactive gas source whose object is a gas source. Background technique

[0002] Radioactivity measurement is the detection and analysis of various radioactive sample sources. Among them, the efficiency calibration and analysis process are an important link. Only when the efficiency calibration is performed accurately and reliably can the effective radioactivity concentration of the sample be obtained. To detect a cylindrical gas sample, it is necessary to make a standard gas source with the same size as the sample. The detection efficiency of the detector is calibrated through the standard gas source, and then the gas sample can be measured and analyzed. When the shape of the sample is different from that of the st...

Claims

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