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CsI(Tl)闪烁体是X光转换为可见光比较重要的一个部件,在惯性约束聚变中的X光诊断等方面有着十分重要的应用。通过Geant4软件较为全面地分析了CsI(Tl)闪烁体软X光能量响应,模拟了1~5keV的软X光入射不同厚度(20,30,50μm)CsI(Tl)的能量沉积谱,探究了粒子之间相互作用的物理过程,并比较了不同能量软X光在不同厚度CsI(Tl)闪烁体中的沉积效率。仿真结果表明,随着CsI(Tl)闪烁体厚度的增加,软X光在CsI(Tl)闪烁体中沉积的能量也逐渐增加,沉积效率与CsI(Tl)闪烁体厚度成正比。模拟研究为选择合适厚度的闪烁体做低能段软X光探测实验做铺垫。
CsI (Tl) scintillator is an important part of X-ray converted to visible light and has very important applications in X-ray diagnosis of inertial confinement fusion. The soft X-ray energy response of CsI (Tl) scintillator was analyzed by Geant4 software. The energy deposition spectra of CsI (Tl) with different thickness (20, 30, 50μm) Particles and the deposition efficiency of different energy soft X-rays in CsI (Tl) scintillators with different thickness was compared. The simulation results show that with the increase of the thickness of CsI (Tl) scintillator, the energy of soft X-ray deposition in CsI (Tl) scintillator increases gradually, and the deposition efficiency is proportional to the thickness of CsI (Tl) scintillator. The simulation study paves the way for the selection of a suitable thickness of scintillator for low-energy soft X-ray detection experiments.