Device and method for randomly adjusting radon precipitation rate and effective decay constant by gas-flow type radon source

Abstract

The invention relates to a device and method for randomly adjusting a radon precipitation rate and an effective decay constant by using a gas-flow type radon source. The device is characterized in that a gas outlet joint and a gas inlet joint in the device are arranged on a compact material plate, a first adjustable micro pump, a first electronic flow meter and a first adsorption pipe are sequentially connected between the gas outlet joint and first gas inlet of the gas-flow radon source, a first gas outlet of the gas-flow radon source is connected with the gas inlet joint, a gas inlet of a second adjustable micro pump is communicated with the atmospheric environment, a second adsorption pipe is connected between a gas outlet of the second adjustable micro pump and a second gas inlet of the gas-flow radon source, and the second gas outlet of the gas-flow radon source is connected with a gas inlet of the second electronic flow meter, and a gas outlet of the second electronic flow meteris communicated with the atmospheric environment. During measurement, a radon collecting cover is buckled on the compact material plate, the radon precipitation rate and effective decay constant of aradon precipitation rate standard device are arbitrarily adjusted by utilizing a gas-flow radon source, and the radon collecting cover is used for testing accuracy and reliability of the method and device for measuring the radon precipitation rate on the surface of a medium.

Description

technical field [0001] The invention relates to a nuclear radiation simulation method and device, in particular to a device and method for arbitrarily adjusting the radon exhalation rate and effective decay constant in a radon exhalation rate standard device by using a flow-type radon source. Background technique [0002] Radon in the air environment mainly comes from the precipitation on the surface of soil and other media. There are many methods and instruments for measuring the radon precipitation rate on the surface of the medium. Since the exhalation rate of radon on the surface of soil and other media varies greatly with the change of the temperature, humidity and air pressure of the environment, it is necessary to check the accuracy and reliability of the method and instrument for measuring the exudation rate of radon on the surface of the media, without being affected by the environment. Radon exhalation rate standard device for temperature, humidity and air pressure...

AI Technical Summary

Problems solved by technology

[0013] Test the accuracy and reliability of the method and instrument for measuring the radon exhalation rate on the surface of the medium on the standard device, and only compare it under a specific effective decay constant condition Yes, it is not sufficient, it needs to be able to adjust the effective decay constant arbitrarily;

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