Chinese Physics C > 2015, Vol. 39 > Issue(5): 056001 DOI: 10.1088/1674-1137/39/5/056001

A measurement system for alpha and beta surface emissionrate using MWPC

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Abstract：
We have developed a large area multi-wire proportional counter (MWPC) as a standard for the measurement of alpha and beta surface emission rate at the Shanghai Institute of Measurement and Testing Technology (SIMT). To shorten the preparation time for chamber gas refilling, a self-designed gas control unit was adopted. Various characteristics of the system have been studied. The uncertainties were analysed. Three certified alpha plane sources (Am-241) and six certified beta plane sources (Tl-204 and Sr-90/Y-90) were measured by this system. The results show excellent agreement with the surface emission rate reported by the National Institute of Measuring, China (NIM) that E _nvalues of all measured sources are within ±1.

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LIN Ye, FANG Fang, REN Jia-Fu, HE Lin-Feng, TANG Fang-Dong, XU Yi-He and DING Wei-Cheng. A measurement system for alpha and beta surface emissionrate using MWPC[J]. Chinese Physics C, 2015, 39(5): 056001. doi: 10.1088/1674-1137/39/5/056001

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Received: 2014-07-23
Revised: 1900-01-01

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

A measurement system for alpha and beta surface emissionrate using MWPC

Corresponding author:FANG Fang,

Received Date:2014-07-23

Accepted Date:1900-01-01

Available Online:2015-05-05

Abstract:We have developed a large area multi-wire proportional counter (MWPC) as a standard for the measurement of alpha and beta surface emission rate at the Shanghai Institute of Measurement and Testing Technology (SIMT). To shorten the preparation time for chamber gas refilling, a self-designed gas control unit was adopted. Various characteristics of the system have been studied. The uncertainties were analysed. Three certified alpha plane sources (Am-241) and six certified beta plane sources (Tl-204 and Sr-90/Y-90) were measured by this system. The results show excellent agreement with the surface emission rate reported by the National Institute of Measuring, China (NIM) thatE_nvalues of all measured sources are within ±1.

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A measurement system for alpha and beta surface emissionrate using MWPC

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