Radioactive surface pollution measuring device and surface pollution measuring method

Abstract

The invention relates to a method for measuring radioactive surface pollution. The method at least comprises the following steps: testing response characteristics of an alpha channel and a beta channel when alpha and beta particles simultaneously exist in a radiation detection device by using a plurality of first standard sources comprising typical nuclides; providing a second standard source of pure alpha particles to determine the response of the alpha particles in the beta channel of the radiation detection device, thereby pre-determining the response coefficient of the beta channel of theradiation detection device to the incident alpha particles; providing a second standard source of pure beta particles to determine the response of the beta particles in the beta channel of the radiation detection device, thereby pre-determining the response coefficient of the beta channel of the radiation detection device to the incident beta particles; dividing the alpha channel response coefficient by the alpha channel counting rate to obtain alpha surface pollution; deducting the alpha particle counting rate by the beta channel counting rate, multiplying the alpha particle counting rate bythe optimized response coefficient of the beta channel to the alpha particles, and dividing by the beta particle response to obtain the beta surface pollution.

Description

technical field [0001] The invention relates to the field of radioactive pollution detection, in particular to a radioactive surface pollution measuring device and a surface pollution measuring method. Background technique [0002] Ionizing radiation is usually also called radioactive radiation. Because the energy of this type of radiation is relatively high, it can cause the atoms of surrounding substances to ionize, so it is called ionizing radiation. In the field of radiation protection, ionizing radiation is radiation that produces ion pairs in biological matter. Ionizing radiation can be divided into α, β, γ(X), n and other radiations according to the nature of the constituent particles. The source of ionizing radiation can be radionuclides (including natural and artificially produced), or nuclear reaction devices, such as reactors, colliders, accelerators, nuclear fusion devices, etc., and can also be used for medical diagnosis and treatment X-ray machine. [0003] ...

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Problems solved by technology

[0014] On the one hand, compared with the traditional radiation detection system and radiation detection method, there are problems that the α signal and β signal that often exist at the same time and crosstalk each other in amplitude, and the single fine measurement mode leads to the low measurement rate of the device. Problem, the radioactive surface contamination measurement device and surface contamination measurement method provided by the present invention, by separately setting the precise measurement mode and the fast measurement mode, avoids the tediousness of data smoothing by using the fast measurement mode when the specific contamination point cannot be determined Time-consuming process to quickly scan a specific area to determine the contamination point, and then accurately measure the determined contamination point through the precise measurement mode to determine the pollution type and pollution level, which greatly improves the measurement efficiency of surface pollution measurement

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