CAJ | 학술논문

目的通过医用加速器机房迷路内辐射水平的测量与分析,为职业照射的控制提供科学依据,为理论模拟计算积累实验数据.方法利用剂量率仪测量加速器机房迷路内的辐射水平,并对测量结果进行理论分析.结果医用加速器机房出入口处杂散X-γ射线剂量率与机头朝向有关.并随照射野的减小而降低;杂散中子剂量率水平主要取决于加速器粒子的能量和输出剂量,随照射野的变化不明显.同时,医用加速器机房出入口处杂散X-γ射线和中子剂量率与医用加速器机房迷路的辐射防护设计密切相关.结论合理改善医用加速器机房迷路的辐射防护设计是降低医用加速器机房出入口处X-γ射线和中子剂量率水平的行之有效的措施.
목적 통과의용가속기궤방미로내복사수평적측량여분석,위직업조사적공제제공과학의거,위이론모의계산적루실험수거.방법 이용제량솔의측량가속기궤방미로내적복사수평,병대측량결과진행이론분석.결과 의용가속기궤방출입구처잡산X-γ사선제량솔여궤두조향유관.병수조사야적감소이강저;잡산중자제량솔수평주요취결우가속기입자적능량화수출제량,수조사야적변화불명현.동시,의용가속기궤방출입구처잡산X-γ사선화중자제량솔여의용가속기궤방미로적복사방호설계밀절상관.결론 합리개선의용가속기궤방미로적복사방호설계시강저의용가속기궤방출입구처X-γ사선화중자제량솔수평적행지유효적조시.
Objective To provide scientific basis for occupational exposure controls and to accumulate experimental data for Monte Carlo simulations by means of measuring and analyzing radiation levels in mazes of medical accelerator loom.Methods The radiation levels in mazes of medical accelerator rooms were measured using dose rate meters,and the results were analyzed.Results At room entrances,the dose rate levels of X-γray are related to medical accelerator head orientations and reduced with the decrease of the sizes of exposure fields.They are mainly decided by the energes of accelerated particles and output doses for neutron dose rate levels which change insignificantly with the sizes of exposure fields.They are closely related with radiation protection design of medical accelerator room mazes.Conclusions It is an effective measure of decreasing X-γray and neutron dose rote levels at medical accelerator loom entrances by improving radiation protection design of medical aceelerotor room mazes.