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计量学报  2022, Vol. 43 Issue (7): 960-964    DOI: 10.3969/j.issn.1000-1158.2022.07.19
  电离辐射、标准物质与生物计量 本期目录 | 过刊浏览 | 高级检索 |
X射线铅当量测量辐射质的建立和能谱模拟
赵瑞1,文玉琴1,2,吴金杰1,韩露1,2,郭彬1
1.中国计量科学研究院,北京 100029
2.成都理工大学,四川 成都 610059
The Establishment of Radiation Qualities and Energy Spectra Simulation of X-ray Lead Equivalent Measurement
ZHAO Rui1,WEN Yu-qin1,2,WU Jin-jie1,HAN Lu1,2,GUO Bin1
1. National Institute of Metrology, Beijing 100029, China
2. Chengdu University of Technology, Chengdu, Sichuan 610059, China
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摘要 医用诊断X射线防护器具的防护性能通常用铅当量表示,根据IEC 61331-1,防护材料衰减性能的测定主要是在40~150kV X射线范围内,研究纯铅、含铅和无铅材料在窄束、宽束以及逆向宽束条件下铅当量的大小。为进一步研究不同测量方法下防护材料的屏蔽性能,需要建立符合标准要求的X射线参考辐射质,并对其能谱进行模拟或测量。依托工业X射线光机,通过添加铝附加过滤和不同厚度铝吸收片,建立了40~150kV范围内8个X射线参考辐射质,测量半值层最大相对偏差为2.8%。利用EGSnrc蒙卡模拟程序,模拟了不同辐射质的X射线能谱,其平均能量与IEC推荐值的最大相对偏差不超过0.4%,满足防护材料X射线铅当量辐射质的要求。
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赵瑞
文玉琴
吴金杰
韩露
郭彬
关键词 计量学X射线铅当量辐射质EGSnrc    
Abstract:The protective performance of medical diagnostic X-ray protective equipment is usually expressed with lead equivalent.According to IEC 61331-1, the measurement of attenuation performance of protective materials is mainly to study the lead equivalent of pure lead, lead-containing and lead-free materials under the conditions of narrow beam, wide beam and reverse wide beam in the range of 40~150kV X-ray. In order to study the shielding performance of protective materials under different measurement methods furtherly, it is necessary to establish the required X-ray reference radiation qualities and simulate or measure the corresponding energy spectrum.Based on the medium energy X-ray radiation device, by adding additional filter, eight X-ray reference radiations qualities in the range of 40~150kV are established and the maximum relative deviation of the HVL is 2.8%. The corresponding X-ray energy spectra are simulated by EGSnrc Monte Carlo simulation program, and the average energy are obtained. The results are consistent with the standard and the maximum relative deviation of average energy is less than 0.4% with IEC. The result can meet the requirements of lead equivalent measurement for X-ray protection materials.
Key wordsmetrology    X-ray    lead equivalent    radiation qualities    EGSnrc
收稿日期: 2020-10-19      发布日期: 2022-07-18
PACS:  TB98  
基金资助:国家市场监督管理总局质量技术基础能力建设专项(ANL2210)
通讯作者: 吴金杰(1981-),浙江东阳人,中国计量科学研究院研究员,主要从事X射线计量研究。Email:wujj@nim.ac.cn     E-mail: zhaorui@nim.ac.cn
作者简介: 赵瑞(1992-),安徽舒城人,中国计量科学研究院助理研究员,研究方向为X射线计量。Email:zhaorui@nim.ac.cn
引用本文:   
赵瑞,文玉琴,吴金杰,韩露,郭彬. X射线铅当量测量辐射质的建立和能谱模拟[J]. 计量学报, 2022, 43(7): 960-964.
ZHAO Rui,WEN Yu-qin,WU Jin-jie,HAN Lu,GUO Bin. The Establishment of Radiation Qualities and Energy Spectra Simulation of X-ray Lead Equivalent Measurement. Acta Metrologica Sinica, 2022, 43(7): 960-964.
链接本文:  
http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2022.07.19     或     http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2022/V43/I7/960
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