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| 医院中子照射器PGNAA系统初步设计及测量 | |
| 引用本文： | 张紫竹,李立华,高集金. 医院中子照射器PGNAA系统初步设计及测量[J]. 中国工程科学, 2012, 14(8): 28-32 |
| 作者姓名： | 张紫竹 李立华 高集金 |
| 作者单位： | 1. 中国原子能科学研究院中国核工业北京四○一医院,北京102413;北京凯佰特科技有限公司,北京102413 2. 中国原子能科学研究院计量测试部,北京,102413 3. 北京凯佰特科技有限公司,北京,102413 |
| 摘 要： | 完成了医院中子照射器(IHNI)瞬发γ中子活化分析(PGNAA)系统的初步设计,并按照设计完成系统搭建。该系统探测器屏蔽部分和中子束屏蔽部分内层均为天然LiF粉末,外层为铅屏蔽层。使用该系统进行的硼浓度测量实验结果表明,该系统可测量10B浓度为10 ppm(1 ppm=10-6),体积为2 mL的样品,10B元素测量灵敏度为0.822 cps(s-1)/ppm。同时发现天然LiF粉末会在待测能区产生较高本底,影响测量精度。 |
| 关 键 词： | 硼中子俘获治疗 IHNI PGNAA 硼浓度 屏蔽 |
| 收稿时间： | 2012-05-20 |
| 修稿时间： | 2012-06-06 |
PGNAA system preliminary design and measurement of IHNI |
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| Zhang Zichu,Li Lihua and Gao Jijin. PGNAA system preliminary design and measurement of IHNI[J]. Engineering Science, 2012, 14(8): 28-32 | |
| Authors: | Zhang Zichu Li Lihua Gao Jijin |
| Affiliation: | 1.China Nuclear Industry Beijing 401 Hospital of China Institute of Atomic Energy,Beijing 102413, China;2.Beijing Capture Technology Co.Ltd.,Beijing 102413,China;3.Irradiation Metrology Division of China Institute of Atomic Energy,Beijing 102413,China) |
| Abstract: | The preliminary design of PGNAA system of IHNI was completed and the system in accordance with the design was set up. For both detector shielding part and the neutron beam shielding part, the inner layer was natural LiF powder and the outer was lead.Then boron concentration measurement experiments using this system were finished.The results show that the the system can measure 10B concentration of 10 ppm, with 2 mL of the sample volume. 10B element measurement sensitivity was 0.822 cps/ppm. Also it was found that the natural LiF powder would produce a high background in the target part of the energy spectrum and affect the measurement accuracy. |
| Keywords: | BNCT IHNI PGNAA boron concentration shielding |
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