BNCT医院中子照射器辐射场特性参数初步测量
1. 中国原子能科学研究院,北京 102413;
2. 北京凯佰特科技有限公司,北京 102413
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摘要
为验证BNCT医院中子照射器的设计效果,对其辐射场的特性参数如中子能谱、中子通量密度及其空间分布、中子和γ吸收剂量率及其空间分布等进行了测量。针对该照射器的特点,建立了一套由多球谱仪、235U裂变电离室、金箔、组织等效正比计数器和热释光探测器组成的测量系统,利用蒙特卡洛计算方法优化设计探测器的结构,以提高超热能区的分辨率和甄别不同能量成分中子的能力。初步测量结果表明,该照射器的中子通量密度达到了预期设计要求。
关键词
BNCT医院中子照射器 ; 中子能谱 ; 中子通量密度 ; 中子和γ吸收剂量率
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