便攜式氡析出率自動(dòng)測(cè)量?jī)x研究
[Abstract]:The reliable measurement of radon exhalation rate is a key factor in environmental radon pollution control. Activated carbon adsorption and electrostatic collection are common methods for measuring radon exhalation rate. Activated carbon adsorption method is suitable for the measurement of radon exhalation rate under the condition of relatively stable temperature and humidity and little change of radon exhalation rate. Electrostatic collection method can be used to measure radon exhalation rate quickly. But at present, the data of radon concentration measured by electrostatic collection radon meter such as RAD7 need to be corrected in order to get radon exhalation rate. In order to realize the reliable measurement of radon exhalation rate, a portable automatic radon exhalation measuring instrument was developed by South China University based on the method of accumulative radon collection and electrostatic collection. The effect of the desiccant on the radon exhalation rate on the surface of the media is reduced. In the natural environment, the instrument can accurately measure the radon concentration, without the help of the computer to carry out linear fitting processing data. The linear fitting can be transformed into algebraic operation by the built-in microprocessor, and the radon exhalation rate can be calculated automatically according to the measured radon concentration. The experimental results show that the relative deviation between the measured values and the reference values is less than 5%. The radon exhalation rate is obtained directly after measurement, which is convenient for the measurement of radon exhalation rate in the field.
【作者單位】: 南華大學(xué)核科學(xué)技術(shù)學(xué)院;衡陽(yáng)師范學(xué)院物理與電子工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(11475082,11275096)
【分類號(hào)】:X859
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