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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

  • 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 En values of all measured sources are within ±1.
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    [1] Stanga D, Felice P D. Appl. Radiat. Isot., 2009, 67: 1716-1720[2] Mostert J C. Appl Radiat Isot, 2008, 66: 925-928[3] NCRP 58. A Handbook of Radioactivity Measurements and Procedures. NCRP Publications, Washington, 1978. 62[4] GUM JCGM 100. Guide to the Expression of Uncertainty in Measurement. International Organization for Standardization, Geneva, 2008, 18-19[5] WU J, YUAN M, SU S et al. Appl. Radiat. Isot., 2002, 56: 261-264

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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
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 shu
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Received: 2014-07-23
Revised: 1900-01-01
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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) that En values of all measured sources are within ±1.

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