快中子散射法检测输油管道油垢的进一步研究  

Further Research of Measuring Grease Stain Thickness in Pipeline Using Fast Neutron Scattering

作　　者：马小强[1] 艾尔肯.阿不列木 赵经武[2] 马加一[2] 李长园[1] 

机构地区：[1]新疆大学科学与技术学院,新疆乌鲁木齐830046 [2]南京大学物理系,江苏南京210093

出　　处：《核电子学与探测技术》2011年第3期331-334,343,共5页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金项目(10965007)

摘　　要：利用由中子束发射器、中子探测器和BH1224型微机多道谱仪组成实验装置,研究了采用同一轴线法检测油垢(聚乙烯模拟)厚度时不同散射角对散射中子计数的响应关系,另外利用MCNP/4C程序模拟了采用同一横截面法中不同散射角时中子计数与油垢厚度响应关系。结果显示,采用同一横截面法检测油垢厚度优于同一轴线法,大散射角优于小散射角,90°散射角在油垢测量中不应采用。同一横截面法中R^2和测量精度的平均值分别为0.9954和0.526mm。Response of neutron counts with different scattering angle on method of same axis was researched on measuring grease stain（polyethylene simulated）thickness using the experimental device which consists of the transmitter of neutron beam,detector of neutron,and the BH1224 compute multi-channel.In addition,by using MCNP/4C program the response of scattering counts was simulated with different scattering angle on method of same cross section.The result showed that using same cross section is more superior than using same axis, large scattering angle is better than the small scattering angle;90 scattering angle should not be used during measuring grease stain thickness.The average of R^2 and accuracy was 0.9954 and 0.526 mm.

关 键 词：测量方式 散射角 灵敏度 模拟 

分 类 号：O571.32[理学—粒子物理与原子核物理]