Device and method for synchronously measuring 222rn and 220rn concentrations by electrostatic collection and solid nuclear track

Abstract

The invention discloses a device and a method for measuring the concentration of <222>Rn and <220>Rn synchronously by adopting electrostatic collection and solid nuclear track. The measurement device consists of a box body, a third filter, a first aluminum diaphragm, a first solid nuclear track detector, a first filter, a second solid nuclear track detector, a second aluminum diaphragm, a second filter, a high-voltage module, a battery, a base plate and a frame-shaped seal ring. In measurement, the high-voltage module in the measurement device is started up, so that high-voltage electrostatic fields are formed between the inner surface of a first measurement cavity of the measurement device and the surface of the first solid nuclear track detector as well as between the inner surface of a second measurement cavity and the surface of the second solid nuclear track detector respectively, and then the measurement device is placed in a measurement environment to measure the concentration of <222>Rn and <220>Rn in air, and the measurement time is T. After the measurement process, the first solid nuclear track detector and the second solid nuclear track detector are taken off, and are subjected to chemical etching, and the concentration of <222>Rn and <220>Rn in the environment is obtained by calculation.

Description

technical field [0001] The invention relates to a nuclear radiation detection technology, in particular to a method for synchronous measurement of environmental radiation using electrostatic collection and solid nuclear track detectors 222 Rn, 220 Apparatus and method for average concentration of Rn. Background technique [0002] ambient air 222 Rn, 220 Rn is the main source of natural radiation received by the human body, and radiation to the human respiratory system is an important cause of lung cancer. The traditional active measurement method is generally to sample the air, and then use the energy spectrum analysis method to obtain the 222 Rn, 220 The concentration of Rn, this method is accurate and fast, but it can only reflect the data of the sampling time period, and cannot obtain long-term average data. Traditional passive measurement methods generally use solid nuclear track detectors to measure the 222 Rn, 220 The long-term average concentration of Rn has b...

AI Technical Summary

Problems solved by technology

The traditional active measurement method is generally to sample the air, and then use the energy spectrum analysis method to obtain the 222 Rn, 220 The concentration of Rn, this method is accurate and fast, but it can only reflect the data of the sampling time period, and cannot obtain long-term average data

Traditional passive measurement methods generally use solid nuclear track detectors to measure the 222 Rn, 220 The long-term average concentration of Rn has been widely used due to the low cost of this method, but its detection sensitivity is low, resulting in large statistical fluctuation errors

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