基于中国辐射虚拟人Rad-HUMAN的中子剂量转换系数及分析  

Neutron Dose Conversion Coefficient Based on Chinese Female Computational Phantom Rad-HUMAN

作　　者：程梦云[1] 王文[1] 范言昌[1] 龙鹏程[1] 胡丽琴[1] 

机构地区：[1]中国科学院核能安全技术研究所,中国科学院中子输运理论与辐射安全重点实验室,安徽合肥230031

出　　处：《原子能科学技术》2015年第B05期22-29,共8页Atomic Energy Science and Technology

基　　金：中国科学院战略性先导科技专项资助项目(XDA03040000);国家自然科学基金资助项目(91026004,11305205);973计划资助项目(2014GB112001)

摘　　要：中子通过物质时具有很强的穿透能力,对人体产生的危险较相同剂量的X射线、γ射线更为严重,因此中子的辐射防护非常重要。目前基于不同体模的中子剂量转换系数的研究是国际上辐射防护领域的一大研究热点。本文利用FDS团队自主构建的中国辐射虚拟人Rad-HUMAN及蒙特卡罗输运程序,模拟不同能量、不同照射方式下单能中子在人体内的输运,得到了一系列器官的中子剂量转换系数和有效剂量值,并将结果与ICRP 74号、116号出版物进行了比较分析。对于某些器官在某些照射条件下,三者结果较一致;但也发现在某些照射条件下,中国辐射虚拟人Rad-HUMAN得到的结果与ICRP 74和ICRP 116号出版物推荐值存在较大差异。该结果对于分析中国人个体与ICRP参考人之间中子剂量转换系数的差异具有重要意义。Neutron has a strong penetration ability, and neutron radiation protection is very important. The study on neutron dose conversion coefficient based on different phantoms is a hot topic in the radiation protection field. The Chinese female computational phantom Rad-HUMAN and the Monte Carlo transport program were used to simulate the neutron transport for different energies and six idealized irradiation geometries in the human body to obtain accurate organ neutron dose conversion coefficient and effective dose. The results were compared with the recommended values in the ICRP 74 and ICRP 116 publication. The results indicate that the calculated values are reasonable in comparison with the values from ICRP 74 and ICRP 116, but in some irradiation conditions, some differences are observed in Rad-HUMAN compared with ICRP 74 and ICRP 116. These results can be used to analyze the difference in neutron dose conversion coefficients between Chinese female and ICRP female reference phantom. Rad- HUMAN is believed to represent average Chinese adult female and the detailed information of Rad-HUMAN can be used to improve the Chinese adult female radiological datasets.

关 键 词：辐射虚拟人 剂量转换系数 蒙特卡罗 Rad—HUMAN 

分 类 号：TL371[核科学技术—核技术及应用]