CAJ | 학술논문

大面积α／β表面污染测量仪采用1000 cm2薄窗流气式正比计数管作为探测器。为实现α／β射线的同时测量，在反符合—脉冲幅度甄别技术的基础上，针对β信号随电压升高而串道明显的实际问题，分析了原因，提出了串道比约束下的探测器工作电压设置方法，以此保证α／β测量的准确性。实验证明，方法可行并符合国家标准的规定。
대면적α／β표면오염측량의채용1000 cm2박창류기식정비계수관작위탐측기。위실현α／β사선적동시측량，재반부합—맥충폭도견별기술적기출상，침대β신호수전압승고이천도명현적실제문제，분석료원인，제출료천도비약속하적탐측기공작전압설치방법，이차보증α／β측량적준학성。실험증명，방법가행병부합국가표준적규정。
A 1000 cm2 thin-window flow gas proportional counter is used as the detector for a large area con -tamination measuring instrument .In order to realize the simultaneous measurement of αand βray, based on the anticoincidence -PHD ( pulse height discrimination ) technology , aiming at the problem of obvious interfer-ence ratio varying with the increase of working voltage , this article has analyzed the causation , and put forward a working voltage setting method subject to the interference ratio .In this way, the accuracy of αand βray measurement could be guaranteed .Experimental results has proved that the feasibility of this method , which ap-propriately met the requirement of national standard .