^(90)Y核药制备中^(90)Sr活度测量装置的模拟研究  

A simulation study on ^(90)Sr radioactivity measurement in ^(90)Y during the nuclear medicine preparation

作　　者：韦舒泉 程伟 屈卫卫 张高龙[4] WEI Shuquan;CHENG Wei;QU Weiwei;ZHANG Gaolong(School of Radiation Medicine and Protection,Soochow University,Suzhou 215123,China;State Key Laboratory of Radiation Medicine and Protection,Soochow University,Suzhou 215123,China;College of Materials Science and Technology,Nanjing Uni-versity of Aeronautics and Astronautics,Nanjing 211106,China;School of Physics,Beihang University,Beijing 100191,China)

机构地区：[1]苏州大学苏州医学院放射医学与防护学院,江苏苏州215123 [2]苏州大学放射医学与辐射防护国家重点实验室,江苏苏州215123 [3]南京航空航天大学材料科学与技术学院,江苏南京211106 [4]北京航空航天大学物理学院,北京100191

出　　处：《哈尔滨工程大学学报》2022年第11期1598-1603,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(11705123).

摘　　要：针对^(90)Y核药制备中^(90)Sr活度测量装置的模拟研究,本文提出了一种通过带电粒子在磁场偏转的方式来确定^(90)Y核药中^(90)Sr含量的方法,并讨论探测器各参数对测量结果的影响。采用基于蒙特卡罗的Geant4模拟工具分别构建点源和体积源2种发射模型,利用2个探头统计受磁场偏转后的β粒子个数,根据^(90)Y和^(90)Sr核素β衰变谱的特征反推出2种核素的含量。结果表明:使用该方法理论上可以确定^(90)Y微球中^(90)Sr含量,但不同的探测器参数对模拟结果存在较大影响,通过优化探测器材料选择、探测器尺寸以及摆放位置等参数可提高测量的精度。To quantify ^(90)Sr content and radioactivity in the preparation of ^(90)Y nuclear propellant,this paper presents a method of using charged particle deflection in a magnetic field and discusses the influence of various parameters on the detection result.The Geant4 toolkit based on the Monte Carlo method was used to simulate the detection of emit-ted electrons.Two kinds of launch models,i.e.,point-source and volume-source,were constructed for the simula-tion.The number of emittedβparticles deflected by the magnetic field was detected by two detectors,and the con-tents of the two nuclides were deduced according to the characteristics of electron energy spectra of ^(90)Y and ^(90)Sr nu-clides.The result verifies that the content of ^(90)Sr in ^(90)Y microspheres can be theoretically determined by this method;however,the method accuracy significantly depends on the type of detector used.Moreover,the accuracy can be improved by optimizing several parameters,including the type of material,size,and placement of the detector.

关 键 词：^(90)Y微球 ^(90)Sr活度 磁谱仪 核药 蒙特卡罗 GEANT4 Β衰变 核素含量 

分 类 号：O571.1[理学—粒子物理与原子核物理]