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磷屏成像的计量性能测试及其在大面积平面源均匀性评价中的应用

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成果类型:
期刊论文
论文标题(英文):
Metrology Performance Test of Phosphor Screen Imaging and Its Application on Uniformity Evaluating of Large-Area Sources
作者:
符燕;梁珺成;邹宇;杨志杰;唐泉;...
通讯作者:
Tang, Q.
作者机构:
[唐泉] School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China
[梁珺成; 杨志杰; 张明; 刘皓然; 赵清] Department of Ionizing Radiation, National Institute of Metrology, Beijing, 100029, China
College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
[符燕] School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China<&wdkj&>Department of Ionizing Radiation, National Institute of Metrology, Beijing, 100029, China
[邹宇] Department of Ionizing Radiation, National Institute of Metrology, Beijing, 100029, China<&wdkj&>College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
通讯机构:
School of Nuclear Science and Technology, University of South China, Hengyang, China
语种:
中文
关键词:
磷屏成像;计量性能;大面积平面源;均匀性
关键词(英文):
Large-area source;Metrology performance;Phosphor screen imaging;Uniformity
期刊:
核化学与放射化学
ISSN:
0253-9950
年:
2017
卷:
39
期:
1
页码:
83-89
基金类别:
国家自然科学基金资助项目(11505179);
机构署名:
本校为第一且通讯机构
院系归属:
核科学技术学院
摘要:
针对磷屏成像技术在放射性活度计量领域的应用需求,开展了磷屏成像响应的重复性、一致性、时间线性与活度线性研究。结果表明:成像灰度值重复性为8.6%(k=2),190 mm×200 mm的磷屏成像区域对于点状源的响应一致;磷屏成像的灰度值与照射的时间成正比,相同照射时间所产生的灰度值与源的发射率也成正比。以这些计量性能结果为基础,严格按照ISO 8769:2010的均匀性评价规则对150 mm×100 mm的大面积源进行了均匀性测量,建立了定量和直观表达平面源均匀性的方法,从而为改善平面源的制备工艺,建立符合国际标准的大面积源计量器具提供了参考评估方法。
摘要(英文):
According to the application requirement of the phosphor screen imaging technology in the field of radioactivity measurement, tests of the repeatability, consistency and linearity with time and radioactivity involving the imaging of phosphor screen are carried out under laboratory conditions. The results show that the repeatability of imaging gray value is 8.6% (k=2), the response of a phosphor screen imaging to point source in the sensitive area of 190 mm×200 mm is equivalent, the gray value of imaging phosphor screen becomes proportional wit...

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