用EGSnrc程序包对单能电子实验过程影响因素的研究  

Study on the influence factors of monoenergetic electrons experiment with EGSnrc package

作　　者：范杰[1] 吴丽萍[1] 赵艳群[2] 王叶[1] 

机构地区：[1]四川大学物理科学与技术学院,成都610064 [2]四川省肿瘤医院,成都610041

出　　处：《四川大学学报（自然科学版）》2009年第5期1417-1422,共6页Journal of Sichuan University(Natural Science Edition)

摘　　要：本文运用蒙特卡罗程序EGSinpRZ和EGSnrcMP模拟了不同能量的单能电子入射过程中与AL吸收物质的作用,得到了该过程产生的并且进入了灵敏区的轫致辐射光子和散射电子平均能量以及他们在相应情况下的百分比,结合两种计算方法(全峰面积法TPA和半峰面积法SPA)讨论了轫致辐射和散射对测量结果的影响;研究了实验所用放射源与其包装材料产生的轫致辐射光子对测量的影响;同时用EGSnrcMP程序模拟了吸收曲线,并与实验吸收曲线相比较,讨论了环境本底对计数的影响.In this article, we simulate the interaction of several different energy monoenergetic electrons in AL materials with EGSinpRZ and EGSnrcMP Monte Carlo code and give the average energies and their percentages of bremsstrahlung photons and scattering electrons which produce in the process and enter the sensitive area. Two measurements （TPA and SPA） are used to discuss how the bremsstrah- lung photons （including those produced in the interaction of the radioactive source and its packaging ma- terials） and scattering electrons affect the results of the electron experiment. The absorption process is simulated and the obtained absorption curve is compared with the experimental curve. The influence of the environmental background on the results is also discussed.

关 键 词：单能电子 EGSinpRZ程序 EGSnrcMP程序 轫致辐射光子 散射电子 

分 类 号：O571.33[理学—粒子物理与原子核物理]