原子能科学技术Issue(3)：545-551,7.DOI:10.7538/yzk.2015.49.03.0545
新型涂硼正比计数器研制及其实验测试和模拟计算
Development of New Type Boron-coating Proportional Counter and Its Experimental Investigation and Simulation Calculation
摘要
Abstract
Three materials wherein suitable proportion of isotope enriched 10B powder , 1 ,2‐ethylene dichloride and formvar resin were blended to make 10B neutron sensitive coating by oneself .A new type proportional counter that coated with 10 B neutron sensi‐tive coating was made .Furthermore ,in order to increase the character and quality of the neutron detector ,a set of 14 annulus epoxy sheets which were sided with 10B film were placed in the tube .A series performance tests were done by 241 Am‐Be neutron source .The tests of 3.7 × 109 Bq 241 Am‐Be neutron source show that the plateau length of detector is 150 V from 750 V to 900 V ,while the plateau slope is 8.2% /100 V . When the working voltage is 800 V ,the count rate of new type boron‐coating propor‐tional counter is 50 s-1 . The level of sensitivity is 0.71 cm2 . Compared with the detector only coated with 10B film in the inner walls of detector ,neutron sensitity area of the new detector increases to 3.15 times . The results show that the plateau length increases from 80 V to 150 V ,and the plateau slope is improved from 12.4% /100 V to 7.58% /100 V ,while the neutron sensitivity increases to 2.63 times . Using Geant4 software based on Monte Carlo method ,this paper presented the response and detection efficiency of new type boron‐coating proportional counter , which was covered withφ55 mm × 250 mm cylinder high density polyethylene moderator material .The simula‐tion results of Geant4 are in agreement with the results of 241 Am‐Be neutron source experiment .It show s the reliability of simulation application .关键词
中子/涂硼正比计数器/坪曲线/探测效率Key words
neutron/boron-coating proportional counter/plateau curve/detector efficiency分类
能源科技引用本文复制引用
张紫霞,魏志勇,朱立,方美华,陈国云,强鹏..新型涂硼正比计数器研制及其实验测试和模拟计算[J].原子能科学技术,2015,(3):545-551,7.基金项目
江苏省普通高校研究生科研创新计划资助项目（CXLX11＿0192）；中央高校基本科研业务费专项资金资助项目 （）
