摘要
针对核辐射n-γ混合场,研制了一种以Gd为核心屏蔽元素,聚苯乙烯-乙烯-丁二烯-苯乙烯(SEBS)为基体的环境友好型射线柔性综合屏蔽体。结果表明Gd2O3粉末呈颗粒状均匀分布,在基体中有良好的分散性;X射线衍射和红外光谱结果表明Gd2O3和基体本质上属于物理机械混合,不涉及化学键变化;γ射线和热中子屏蔽性能验证表明,随着Gd面密度的提高,γ射线和热中子透射率遵从指数衰减规律;当Gd面密度为0.0184~0.2913 g/cm^(2)时,39、59和122 keVγ射线透射率为83.73%~11.48%,75.43%~2.73%和93.03%~51.64%;当Gd面密度为0.0189~0.0709 g/cm^(2)时,0.2 cm厚材料中子透射率为45.74%~35.78%。该射线柔性综合屏蔽体具有绿色环保、生产节能、综合防护、柔性可塑、可回收使用等特点,有效弥补了传统防护材料的弊端,在未来舰船生物屏蔽、核医学诊疗、安全检测等领域具有潜在应用价值。
For nuclear radiation n-γmixed field,a kind of environment-friendly ray flexible synthetic shielding material was developed using Gd as the core shielding element and SEBS as the matrix.It has the characteristics of environmental protection,production energy saving,comprehensive protection,flexible plastic,recyclable,etc.SEM result shows that Gd_2O_3 powder distributes uniformly in granular form and has excellent dispersion in the matrix.X ray diffraction(XRD)and Fourier-transformed infrared(FT-IR)results show that Gd_2O_3 and SEBS are essentially physico-mechanical mixtures,and do not involve changes in chemical bond.The shielding results ofγray and thermal neutrons show that with the increase of Gd areal density,the transmittances inγray and thermal neutrons follow the exponential attenuation law.When the Gd areal density is 0.0184-0.2913 g/cm~2,theγray transmittances of material at 39,59 and 122 ke V are 83.73%-11.48%,75.43%-2.73%and 93.03%-51.64%,respectively.When Gd areal density is 0.0189-0.0709 g/cm~2,the neutron transmittance of material is 45.74%-35.78%.This flexible ray shielding material effectively makes up the disadvantages of traditional shielding materials.It has potential application values in the biological shielding in ships,nuclear medical diagnosis and treatment,radiographic testing and other fields.
作者
王博宇
郭晓林
原林
李天来
仇天祎
方青龙
王晓娟
王琦
刘洋
Wang Boyu;Guo Xiaolin;Yuan Lin;Li Tianlai;Qiu Tianyi;Fang Qinglong;Wang Xiaojuan;Wang Qi;Liu Yang(Xi'an Polytechnic University,Xi'an 710048,China;Engineering Research Center of Flexible Radiation Protection Technology,Universities of Shaanxi Province,Xi'an 710048,China;Xi'an Key Laboratory of Nuclear Protection Textile Equipment Technology,Xi'an 710048,China;Shaanxi Provincial Centre for Disease Control and Prevention,Xi'an 710054,China;China Institute of Atomic Energy,Beijing 102413,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2024年第2期537-545,共9页
Rare Metal Materials and Engineering
基金
陕西省科技计划自然基础研究项目(2022JM-054)
陕西省自然科学基础研究计划项目(2023-JC-YB-827)
陕西省教育厅重点科研计划项目(22JY023)。
关键词
GD
中子
Γ射线
柔性材料
辐射防护
gadolinium
neutron
ray
flexible material
radiation protection
