Radon daughter potential calculation method based on high voltage corona sampling method

A high-voltage corona and calculation method technology, applied in the field of nuclear radiation detection, can solve the problems of calculating the potential of radon progeny and the inability to achieve flexible and diverse sampling and measurement methods, and achieve automatic measurement, easy implementation, and simplified calculation methods Effect

Active Publication Date: 2016-05-25
EAST CHINA UNIV OF TECH
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Problems solved by technology

This sampling method uses metal sampling sheets and cannot use conventional methods to obtain parameters such as sampling efficiency, so it is also impossible to use conventional methods to calculate the potential

Method used

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  • Radon daughter potential calculation method based on high voltage corona sampling method
  • Radon daughter potential calculation method based on high voltage corona sampling method
  • Radon daughter potential calculation method based on high voltage corona sampling method

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Embodiment Construction

[0045] The present invention will be described in more detail through the accompanying drawings and specific embodiments below. For a newly produced high-voltage corona sampler, the scale coefficient K should be obtained first by using the comparison method. The experiment to obtain the scale coefficient K should be carried out in an environment with a stable radon daughter concentration, for example, the calculation method of the scale coefficient K in a standard radon daughter chamber is as follows:

[0046] The radon daughter room is adjusted to a stable radon daughter concentration, and the current standard radon daughter potential concentration C is used by the standard equilibrium equivalent radon concentration measuring instrument ps . Simultaneously also carry out radon progeny sampling with high-voltage corona sampler, obtain the count N of measuring the total α of sampling piece by the technical scheme (1)~(4) step that the present invention provides, obtain scale c...

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Abstract

The invention discloses a radon daughter potential calculation method based on a high voltage corona sampling method. A technical scheme of the invention is characterized by firstly, using the high voltage corona sampling method to collect radon daughters; then using a total alpha measurement system to measure a sampling sheet; according to a formula given in the invention, solving a time factor; and finally acquiring a radon daughter potential concentration. Simultaneously, the invention provides calculation steps of a comparison method used for a key parameter scale coefficient. The calculation method provided in the invention is the radon daughter potential concentration calculation method based on the high voltage corona sampling method and the method is high-efficiency, flexible and easy to realize. And the method can be popularized to other radon daughter potential concentration measuring instruments.

Description

technical field [0001] The design of the invention is a nuclear radiation detection technology, in particular a method for measuring the sampling piece and calculating the potential of the radon daughter after the radon daughter is collected by the high-voltage corona method. Background technique [0002] 222 Rn is an inert gas that does not chemically combine with lung tissue after inhalation, and stays in the human body for a short time, so most 222 Rn is inhaled and then exhaled, and the harmful dose in the respiratory tract is very small. 222 The short-lived progeny of Rn is not the case. They belong to charged metal particles (suspended in the air), and are easily adsorbed on aerosol particles in the air. After being inhaled, most of the progeny can stay on the tracheal wall or lung lobe. The α-particles emitted by them during the decay process are exposed to the human body for a long time, causing the ionization of the damaged tissues or cells (mainly the lungs), or ...

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Application Information

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IPC IPC(8): G01T1/167
Inventor 张雄杰王仁波汤彬瞿金辉
Owner EAST CHINA UNIV OF TECH
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