Research on Lead Equivalent Measurement of Narrow X-ray Beam Shielding Material
HAN Lu1,2,ZHAO Rui2,WU Jin-jie2,LU Chun-hai1,WEN Yu-qin1,2,YAN Yong-qiang2,3
1. Chengdu University of Technology, Chengdu, Sichuan 610059, China
2. National Institute of Metrology, Beijing 100029, China
3. China Jiliang University, Hangzhou, Zhejiang 310018, China
Abstract：The shielding performance of radiation protection materials is usually expressed in lead equivalent. In order to measure the shielding ability of different protective materials accurately, according to the IEC 61331 standard, the X-ray radiation quality for lead equivalent measurement has been researched and established. The radiation quality spectrum was simulated by using EGSnrc software to study the influence of different thicknesses of lead on the radiation quality spectrum. The narrow beam condition measurement method of X-ray lead equivalent has been discussed, and the lead equivalent of 16 different protective materials under narrow beam condition was tested. The results showed that the established radiation quality meets the standard requirements. Under the condition of 120kV tube voltage, the lead equivalent measurement result of the protective material is equal to or greater than the nominal lead equivalent value, indicating that the shielding effect of the tested material meets the requirements.
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2021, Vol. 42 
