A fixed bracket for rapid on-site measurement of environmental samples

Abstract

The invention relates to a fixed support for on-site rapid measurement of environmental samples. The fixed support at least comprises pipe bodies, limiting parts, a cover plate, a pull rod and a sample groove, wherein the pipe bodies are double-layer structures which at least comprise organic glass layers and tungsten alloy layers; the tungsten alloy layers are sleeved with the organic glass layers, wherein the thicknesses of the tungsten alloy layers are 0 to 6mm, scales in the axial directions of the pipe bodies are arranged on the outer walls of the organic glass layers, and the outer walls of the pipe bodies are sleeved with the limiting parts. According to the invention, the pipe bodies are provided with structures of the tungsten alloy layers to effectively shield external interference and further protect damage of radioactivity generated by the samples to staff in a measurement process; furthermore, the scales are located on the outer sides of the pipe bodies, so that the relative position of the samples to be measured and a detector probe can be accurately adjusted, and more demands of precise efficiency calibrations and the like of different media and different positions which are closely combined with the actual measurement in the measurement process of the radioactivity can be met.

Description

technical field [0001] The invention relates to a fixing bracket, in particular to a fixing bracket for rapidly measuring the radioactivity of environmental samples on site. Background technique [0002] With the rapid development of nuclear and radiation technology, more and more nuclear accidents have occurred, especially the atomic bombings of Hiroshima and Nagasaki in Japan, the Chernobyl nuclear accident in the former Soviet Union and the Fukushima nuclear power accident in Japan, etc. Nuclides are released into the environment, and some artificial radioactive substances are distributed in the global environment through atmospheric circulation and other means. Therefore, the harm of radioactive substances in the environment to human beings is attracting more and more attention. [0003] Gamma energy spectrum measurement is one of the most mature nuclear analysis methods. At present, in addition to ground applications, gamma energy spectrum measurement technology can be ...

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of the existing technology is: the current method of environmental sample measurement is mainly through collecting the sample back to the laboratory, then performing sample pretreatment and other processes, and finally carrying out sample loading and measurement. There is no mature and accurate on-site fast gamma energy spectrum analysis method Therefore, it cannot meet the needs of rapid, accurate and highly sensitive quantitative analysis of various environmental samples collected on site.

However, due to the fact that the beryllium window of the wide-energy detector probe is very thin at present, its thickness is mostly 10 -4 In the order of m, it is easy to damage the detector probe during the measurement process

More importantly, on-site gamma energy spectroscopy is not equipped with a fixed sample holder, and the repeatability of each measurement position cannot be guaranteed, which greatly increases the measurement error or uncertainty

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