A measurement system for alpha and beta surface emission rate using MWPC

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 contr...

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Bibliographic Details
Published inChinese physics C Vol. 39; no. 5; pp. 60 - 63
Main Author 林业 方方 任家富 何林锋 唐方东 徐一鹤 丁卫撑
Format Journal Article
LanguageEnglish
Published 01.05.2015
Subjects
Chambers
China
Emission
Planes
Proportional counters
Refilling
Strontium
不确定性
准备时间
控制单元
正比计数器
测试技术
测量标准
测量系统
表面发射率
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Summary: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 （T1-204 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 En values of all measured sources are within ±1.
Bibliography:11-5641/O4
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 （T1-204 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 En values of all measured sources are within ±1.
LIN Ye, FANG Fang, REN Jia-Fu,HE Lin-Feng, TANG Fang-Dong, XU Yi-He, DING Wei-Cheng（1 Provincial Key Laboratory of Applied Nuclear Techniques in Geosciences, Chengdu University of Technology Dongsanlu, Erxianqiao, Chenghua District, Chengdu 610059, China; 2 Laboratory of Ionizing Radiation, Shanghai Institute of Measurement and Testing Technology, 1500 Zhang Heng Road, Shanghai 201203, China）
alpha/beta counting, surface emission rate, plateau curve, MWPC
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/39/5/056001