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| Monte Carlo Simulation and Experimental Validation of Correction Factor for Cylindrical Cavity Ionization Chamber |
| WU Meng-meng1,LI De-hong2,WANG Pei-wei2 |
1. China Institute of Atomic Energy, Beijing 102413, China
2. National Institute of Metrology, Beijing 100029, China |
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Abstract To discuss how to use nominal 10 cm3 cylindrical cavity ionization chamber to give absolute measurement to the Cs-137 air kerma. The wall correction factor kwall and the axial non-uniformity correction factor kan is determined by both the experimental method and Monte Carlo (MC) calculation. The results showed, the wall correction factor kwall determined by geometry thickness extrapolation method is less than 0.091% compared with that by the MC calculation, the axial non-uniformity correction factor kan determined by the experimental method is less than 0.63% compared with that by the MC calculation. The error between the two values is acceptable. The repeated experiment will inevitably introduce other error factors, and MC calculation method is simple and high repeatability. Eventually we selected MC calculation results for kwall, kan value.
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Received: 12 June 2015
Published: 27 January 2016
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2016, Vol. 37 
