Gamma absorption dose rate instrument having soil moisture correction and correction method thereof

Abstract

The invention discloses a gamma absorption dose rate instrument having soil moisture correction. The gamma absorption dose rate instrument comprises a detector and a host. The detector comprises a shell and a detection head arranged in the shell. The detection head is vertically downward, and the top part is provided with a photomultiplier and a pre-amplification circuit in turn. The two sides of the detector are respectively provided with a supporting rod. The bottom part of the supporting rod exceeds the bottom part of the detector. The supporting rod is provided with a slide rod. A soil hygrometer is fixedly connected on the lower surface of the slide rod. The output end of the soil hygrometer is connected with the host. The actually measured data of the detector can be corrected in real time according to the moisture so that the data are enabled to be more accurate and reliable after moisture correction, and the requirements that the samples require to be used for comparison and judgment under the dry condition can be met.

Description

technical field [0001] The invention relates to a nuclear radiation detection technology, in particular to a gamma absorbed dose rate meter with soil moisture correction and a correction method. Background technique [0002] With the rapid development of nuclear industry and nuclear technology application industry, nuclear detection technology has also been vigorously developed. Because the gamma dose rate meter is mainly used to measure the absorbed dose rate of ambient air, it has the characteristics of stable work, portability, and high sensitivity. It is an important means of environmental on-site radiation dose monitoring. has been widely applied. [0003] Field gamma dose measurement is subject to many interference factors, such as the influence of soil moisture content measurement. In the process of rainfall, water is stored in the pores of the soil, and the soil structure has a certain porosity. After the pores are filled with water, the material composition of the...

AI Technical Summary

Problems solved by technology

In the process of rainfall, water is stored in the pores of the soil, and the soil structure has a certain porosity. After the pores are filled with water, the material composition of the soil is changed. When the gamma rays pass through the soil, the scattering and photoelectric cross-sections change, making The effective cross section changes; when the gamma rays pass through the soil, the structure of the energy spectrum on the ground changes, which in turn affects the measured value of the gamma dose rate, which cannot accurately reflect the real radiation environment

Therefore, the measured data is not accurate. How to remove the interference generated during the measurement and obtain accurate measurement data effectively in real time is a problem we need to solve.

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