基于反射滤光方法的氟化钡快响应γ射线探测技术  

BaF_2 Detector with Fast Time Response for γ-Ray Pulse Measurement Based on Ultraviolet Band-Pass Optical Filter

作　　者：张子川[1] 韩和同[1] 管兴胤[1] 刘君红[1] 张侃[1] 赵晓川[1] 翁秀峰[1] 

机构地区：[1]西北核技术研究所,西安710024

出　　处：《现代应用物理》2013年第3期225-231,共7页Modern Applied Physics

摘　　要：测量和分析了氟化钡(BaF2)晶体的基本光谱特性;设计并研制了一种反射式紫外带通滤光器,用于抑制BaF2晶体630ns慢响应荧光成分并获取0.6ns快响应荧光成分,快慢成分之比提高了102以上。基于该滤光器和BaF2晶体,研制了ns级时间响应γ射线探测器,可用于强流快脉冲γ射线测量。The spectral characteristics of a barium fluoride(BaF2)crystal were measured and ana- lyzed.A novel reflective ultraviolet band-pass optical filter was designed and investigated to inhibit a slow response fluorescence component in a BaF2 scintillator.A fast response fluorescence component of 0.6ns was achieved in the recorded signals,and the light output ratio of fast to slow fluorescence component was greatly increased by more than 102 times.A gamma-ray detector based on the devel- oped optical filter,which has a fast time response of nanosecond order,was developed to monitor high-intensity and rapidly changing pulsed gamma-ray flux.

关 键 词：氟化钡晶体(BaF2) 反射滤光 脉冲辐射测量 时间响应 

分 类 号：O433[机械工程—光学工程] TL812[理学—光学]