摘要
由241Am-Be源、ZnS探测器和微机多道谱仪等组成的实验装置,测量了聚乙烯厚度的透射中子计数,同时应用蒙特卡洛MCNP/4C程序,分别计算了单层铁板代替管道、双层铁板代替管道、无保温层圆形输油管道以及有保温层圆形输油管道四种情况下,不同源距时油垢厚度对透射快中子计数的响应(灵敏度),实验和模拟结果显示随着源距的增加,测量灵敏度在下降。
A set of transmission neutron counts corresponding to different polyethylene thicknesses was obtained by using an experiment setup,which consists of 241Am-Be source,ZnS detector,and computer multi-channel spectrometer,and gives the simulation results of the MCNP/4C method,which simulated the response relation（sensibility） between transmitted neutron counts and grease stain thickness in monolayer iron plate instead of the pipeline,double deck iron plates instead of the pipeline and a pipeline without or with thermal insulation layer under different source-distances.The experimented and simulated results show that the sensibility fall with the increase of source-distances.
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2010年第11期1493-1497,1508,共6页
Nuclear Electronics & Detection Technology
基金
国家自然科学基金项目
快中子测量油垢厚度的方法研究(10965007)
关键词
MCNP
模拟
源距
透射中子
MCNP simulation
source-distances
transmitted neutron
