医用电子加速器高能光子水吸收剂量溯源  

Traceability of absorbed dose to water in high-energy photon beams in medical electron accelerators

作　　者：陆逊[1] 眭国平[1] 杭雪莲 王鹏德[1] 孙荣荣[1] 肖瑶[1] 陈建新[1] 黄军[1] 

机构地区：[1]上海市计量测试技术研究院,上海201203

出　　处：《辐射研究与辐射工艺学报》2017年第6期48-51,共4页Journal of Radiation Research and Radiation Processing

基　　金：质检公益性行业科研专项:医用加速器光子吸收剂量溯源技术与标准装置研究(201510001-03)~~

摘　　要：采用直接法测量医用电子加速器高能光子水吸收剂量,与我国现行的从空气比释动能转化为水吸收剂量间接法测量的结果进行比较。结果表明,两种方法测量结果相差1%以内,同时用传递比较法进行了验证。证明我国基于加速器光子水吸收剂量基准而建设的水吸收剂量溯源体系是可行的,为我国水吸收剂量直接测量提供依据。Results obtained by direct measurement of absorbed dose to water for medical electron accelerators were compared with that by indirect measurements （through converting the measured air kerma into absorbed dose to water）. Experiments results demonstrate that the difference between two methods is within 1%, it is validated by the transfer comparison method meanwhile. It is demonstrated that the absorbed dose to water traceability system based on the photon absorbed dose to water for the accelerator is feasible. This provides the basis for direct measurement of absorbed dose to water for accelerators.

关 键 词：高能光子 水吸收剂量 辐射质修正因子 量值传递 量值溯源 

分 类 号：TL99[核科学技术—核技术及应用]