2023·13本刊特稿1ModernChemicalResearch当代化工研究2023·13本刊特稿1ModernChemicalResearch当代化工研究Pb纳米颗粒对射线屏蔽的有限元模拟＊范紫旭1李佳1*李夺2魏延旭3黄红梅4（1.辽宁工业大学辽宁1210012.辽宁陆平机器股份有限公司辽宁1120013.沈阳第一军代室辽宁1100114.中国科学院理化技术研究所北京100190）摘要：传统铅金属作为射线屏蔽材料，虽有良好的屏蔽效果，但其较大的重量限制了车载CT的机动性。近年来，研究表明，纳米颗粒对于射线的屏蔽效率更高。本文利用COMSOL有限元模拟软件，模拟了边长100nm的Pb纳米颗粒对X射线的衰减及散射效果。结果表明，Pb纳米颗粒对X射线具有良好的屏蔽效果。同时，X射线的散射作用也能够增加X射线在屏蔽材料中的光程。纳米颗粒基复合材料将有望取代铅板作为车载CT的射线屏蔽墙，这对于车载CT轻量化将具有重要意义。关键词：X射线屏蔽；Pb纳米颗粒；车载CT；有限元模拟中图分类号：O434.11文献标识码：ADOI：10.20087/j.cnki.1672-8114.2023.13.001FiniteElementSimulationofRadioshieldingbyPbNanoparticlesFanZixu1,LiJia1*,LiDuo2,WeiYanxu3,HuangHongmei4(1.LiaoningUniversityofTechnology,Liaoning,1210012.LiaoningLupingMachineryCo.,Ltd.,Liaoning,1120013.ShenyangFirstMilitaryRepresentativeOffice,Liaoning,1100114.InstituteofPhysicalandChemicalTechnology,ChineseAcademyofSciences,Beijing,100190)Abstract：Althoughtraditionalleadmetalasaradiationshieldingmaterialhasagoodshieldingeffect,itslargeweightlimitsthemobilityofvehicleCT.Inrecentyears,studieshaveshownthatnanoparticlesshieldraysmoreefficiently.Inthispaper,thefiniteelementsimulationsoftwareofCOMSOLwasusedtosimulatetheabsorptionandscatteringeffectofPbnanoparticleswithasidelengthof100nmonX-rays.TheresultsshowthatPbnanoparticleshaveagoodshieldingeffectonX-rays.Atthesametime,thescatteringeffectofX-rayscanalsoincreasetheopticalpathofX-raysintheshieldingmaterial.NanoparticlematrixcompositesareexpectedtoreplaceleadplatesasradiationshieldingwallsforautomotiveCT,whichwillbeofgreatsignificanceforthelightweightofautomotiveCT.Keywords：X-rayshielding；Pbnanoparticles；on-boardCT；finiteelementsimulation1.引言自电离辐射被发现以来，提高辐射屏蔽的效率一直是一个具...
