<220>Rn measurement method and device based on time spectrum analysis

Abstract

The invention provides a <220>Rn measurement method and device based on time spectrum analysis. According to the <220>Rn measurement method, a decay time spectrum is established for nuclear pulse time by using a decay time characteristic of a radon isotope, so that <220>Rn-<216>Po coincidence is distinguished from stray coincidence of a background and other radiations, and the purpose of measuring <220>Rn concentration is realized. The <220>Rn measurement device based on the time spectrum analysis, which is used by the method, consists of a microprocessor, a pulse shaper, a small keyboard, an LED (Light-Emitting Diode) display unit, a communication port and a power source; the pulse shaper is connected with the microprocessor through a cable; the small keyboard is connected with the microprocessor through a cable; the LED display unit is connected with the microprocessor through a cable; the communication port is connected with the microprocessor through a cable; and the power source is connected with the microprocessor through a cable.

Description

technical field [0001] The design of the present invention relates to a 220 Rn measurement method and device, especially a method based on time spectrum analysis 220 Rn measuring method and device. Background technique [0002] Radon is one of the main sources of natural radiation that humans are exposed to. In recent years, it has been discovered that it has been neglected in the past 220 The exposure of Rn (thoron) to humans is much higher than estimated in the past; 232 The Th content is 1.6 times the world average, which makes it possible to measure and investigate the 220 Rn has become a new focus of radiation protection at home and abroad in recent years. evaluate 220 When the radiation dose to the public caused by Rn and its progeny is accurately measured 220 Rn concentration is the key. because 220 The half-life of Rn is very short, and the existing measurement techniques and calibration methods are not perfect enough. Especially at 222 Rn / 220 Rn mixed ca...

AI Technical Summary

Problems solved by technology

because 220 The half-life of Rn is very short, and the existing measurement techniques and calibration methods are not perfect enough

Especially at 222 Rn / 220 Rn mixed case, 222 Rn, 220 Mutual interference between Rn causes 222 Rn / 220 The problem of Rn measurement error has not been fully resolved

Although there are some commercial radon measuring instruments on the market (such as RAD-7 of Durridge Company of the United States and RTM2100 of SARAD Company of Germany, etc.) 222 Rn, 220 The screening measurement of Rn gas, but most of the instrument measurements are either affected by the state of the desiccant or the humidity of the external environment, making the measurement efficiency related to the state of the daughter body and the environment, which is difficult to use 220 Accurate measurement of Rn

At the same time, most of the traditional radon measuring instruments contain hardware equipment for complex waveform processing, etc., and there are deficiencies in the miniaturization and intelligence of the instrument, which is not conducive to carrying and field measurement

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