塑料闪烁光纤在高能中子辐照下质子分布特性的数值模拟  

Numerical simulation of distribution of recoil proton in plastic scintillating fiber irradiated by high-energy neutron

作　　者：马庆力[1] 唐世彪[2] 邹继伟[3] 

机构地区：[1]电子工程学院电子系,合肥230038 [2]中国科学技术大学近代物理系,合肥230026 [3]电子工程学院科研处,合肥230038

出　　处：《强激光与粒子束》2008年第7期1187-1189,共3页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(60602065)

摘　　要：利用Geant4系统模拟了在高能中子照射下,塑料闪烁光纤中产生的反冲质子的分布特性,分析了入射中子能量分别为2,4,6,8 MeV时,产生的反冲质子能量和方向分布,给出了反冲质子在不同方向上的能量分布。结果表明:向前和向后出射的质子分布不对称;反冲质子的能量在零与入射中子能量之间连续地分布;接近垂直入射方向产生的质子数较多;入射中子能量越高,产生质子数越少;反冲质子的出射角度越小,其能量越大,即沿着入射中子方向的反冲质子能量较大,垂直入射方向的反冲质子能量较小。Through Geant4 simulation, the characteristics of recoil proton in plastic scintillating fibers irradiated by high-energy neutrons have been presented. The energy and angular distributions of recoil proton have been analyzed with incident neutron energy of 2, 4, 6, 8 MeV. The results show that the energy of the recoil proton ranges from zero to incident neutron energy. The recoil proton energies vary inversely as angles, that is, the protons along the direction of incident neutrons have the biggest energy and those along the fiber radius have relative smaller energy.

关 键 词：反冲质子 高能中子 塑料闪烁光纤 数值模拟 

分 类 号：TN25[电子电信—物理电子学] TP751[自动化与计算机技术—检测技术与自动化装置]