“核-光转换”中子探测系统物理结构的模拟研究  

Simulation Calculation on Nuclear-Optical Converters for Neutron Detection

作　　者：张建华[1] 李波均[1] 彭太平[1] 

机构地区：[1]中物院核物理与化学研究所,四川绵阳621900

出　　处：《核电子学与探测技术》2012年第1期95-97,共3页Nuclear Electronics & Detection Technology

基　　金：中国工程物理研究院发展基金(2010B0103003)

摘　　要："核-光转换"中子探测器是以惰性气体为介质将裂变碎片能量转换为光辐射的裂变室,拥有电离探测器所没有的优点:不需要供电电源;信号传输方式采用光导或光纤,而不是绝缘电缆;对伽马辐射极不灵敏;输出信号较大,可以避免在探测器附近使用前置放大器。根据"核-光转换"中子测量系统的特点,采用Geant4模拟了铀裂变靶厚度、惰性气体成分、腔体材料等对到达惰性气体的裂变碎片和可见光的影响,给出了NOC结构设计的最佳参数和中子能量响应。Nucear-optical converters（NOC） are fission chambers based upon fission fragement energy conversion to optical radiation in gas luminescent media.NOCs offer a number of potential advantages over ionization detectors.The detectors require no power supply.Signals are transmitted via light-pipe or fiber optics rather than insulated electrical cable.The detectors are less sensitive to gamma radiation.NOC can produce large signals,obviating the need for pre-amplifiers near the detector.According to the characteristics of NOC,under the different conditions,like as the thickness of U target,type of inert gases,material of container,fission fragments and light intensities was simulated by Geant4;We obtained the optimal parameter to design the NOCs,and calculated the energy response of neutron.

关 键 词：核-光转换 裂变室 中子能量响应 GEANT4 

分 类 号：TL816.3[核科学技术—核技术及应用]