新型龙虾眼X射线聚焦结构原理理论模拟  

Theoretical Simulation of Principle for New Lobster-eye X-ray Focusing Structure

作　　者：杜昱[1] 张国光[1] 丰树强[1] 苏丹[1] 张帅[1] 孙汉城[1] 王国宝[1] 

机构地区：[1]中国原子能科学研究院核技术应用研究所,北京102413

出　　处：《原子能科学技术》2016年第2期343-348,共6页Atomic Energy Science and Technology

摘　　要：为验证新型龙虾眼X射线聚焦结构聚焦X射线的可行性,对新型龙虾眼X射线聚焦结构的设计进行了研究。应用蒙特卡罗方法模拟了能量约为80keV的硬X射线照射到不同材料的物体上发生背散射的情形,结果表明,能量高于80keV的X射线与靶物质相互作用时,大部分光子沿入射方向穿透进去,部分光子与靶物质原子发生光电效应而被吸收,极少部分光子会与靶物质原子发生康普顿背散射;经由不同材料的靶物质背散射的光子能谱可明显区分,经新型龙虾眼X射线聚焦结构汇聚后,能得到相对准确的靶物质材料信息。In order to verify the feasibility of focusing X-ray with the new lobster-eye X-ray focusing structure, the study on design of the new lobster-eye X-ray focusing structure was carried out with Monte Carlo simulation. The circumstances around 80 keV X-ray scattered by different sorts of materials were achieved through Monte Carlo simulation. The results show that most of the photons above 80 keV can penetrate the target material, while some photons are absorbed by the target material through the photo electric effect and a few photons are scattered via the Compton interaction. Mean- while, the energy spectra of 80 keV X-ray backscattered by different materials can be distinguished clearly, and the details of those materials can be obtained by analyzing the new lobster-eye X-ray focusing images.

关 键 词：X射线聚焦 新型龙虾眼 蒙特卡罗模拟 可行性 

分 类 号：TG115.22[金属学及工艺—物理冶金]