首页|含Gd环境友好型射线柔性综合屏蔽体研究

含Gd环境友好型射线柔性综合屏蔽体研究

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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/cm2时,39、59和122 keV γ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/cm2 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.
Environment-Friendly Flexible Radiation Shielding Materials Incorporated with Gd
For nuclear radiation n-γ mixed 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 Gd2O3 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 Gd2O3 and SEBS are essentially physico-mechanical mixtures,and do not involve changes in chemical bond.The shielding results of γ ray and thermal neutrons show that with the increase of Gd areal density,the transmittances in γ ray and thermal neutrons follow the exponential attenuation law.When the Gd areal density is 0.0184-0.2913 g/cm2,the γ ray transmittances of material at 39,59 and 122 keV 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/cm2,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.

gadoliniumneutronγ rayflexible materialradiation protection

王博宇、郭晓林、原林、李天来、仇天祎、方青龙、王晓娟、王琦、刘洋

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西安工程大学,陕西西安 710048

射线柔性防护技术陕西省高校工程研究中心,陕西西安 710048

西安市核防护纺织装备技术重点实验室,陕西西安 710048

陕西省疾病预防控制中心,陕西西安 710054

中国原子能科学研究院,北京 102413

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Gd 中子 γ射线 柔性材料 辐射防护

陕西省科技计划自然基础研究项目陕西省自然科学基础研究计划项目陕西省教育厅重点科研计划项目

2022JM-0542023-JC-YB-82722JY023

2024

稀有金属材料与工程
中国有色金属学会,中国材料研究学会,西北有色金属研究院

稀有金属材料与工程

CSTPCD北大核心
影响因子:0.634
ISSN:1002-185X
年,卷(期):2024.53(2)
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