摘要
本文阐述了X、γ射线照射量(治疗水平)标准装置技术研究的主要内容.引进可以直接测量比释动能的PTW-UNIDOS高精度静电计全面更新主测量系统,同时实现X射线机、γ刻度装置、辐射场环境条件的综合换代升级.完成后用新装置对Farmer2560照射量计(№107)进行了X、γ射线照射量校准因子的替代法与直接比较法的检定比对实验,结果表明两种方法与中国计量科学研究院的检定结果的符合程度在0～0.5%以内.
This paper expatiates main contents of technical research of the measuring standard apparatus of X,γ-ray exposure in radiotherapeutic degree and introduced the high precision PTW-UNIDOS electrometer which can measure kerma directly. The chief measure system,the X-ray set and the gamma calibration device and ambient condition of radiation fields have comprehensively been superseded and upgraded.As the program finished, the authors have conducted a contrast experiments on X,γ-ray exposure calibration factors of Farmer2560 exposure meter （No 107） in the two verification methods of substitution and direct-comparison. The results show the conformance of the two methods and NIM is within 0 - 0.5 %.
出处
《中国测试技术》
2005年第6期32-35,共4页
CHINA MEASUREMENT & TESTING TECHNOLOGY
基金
国家科技基金条件平台重点专项(2004DIA1J003)
