大面积流气式电离室的研制及性能测试  

Development and Performance Test of Large Area Flow Gas Ionization Chamber

作　　者：党云博[1] 丁有钱[1] 孙宏清[1] 马鹏[1] 黄昆 张生栋[1] DANG Yun-bo;DING You-qian;SUN Hong-qing;MA Peng;HUANG Kun;ZHANG Sheng-dong(China Institute of Atomic Energy,P.O.Box 275(126),Beijing 102413,China)

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《核化学与放射化学》2020年第5期391-396,I0005,共7页Journal of Nuclear and Radiochemistry

摘　　要：核设施退役过程中,超铀核素放射性样品的无损测量一般通过γ能谱法实现,但由于超铀核素的γ射线发射几率一般较低,因此这种测量方法的探测限较高,不适用于溶解后低水平放射性样品的测量。本工作建立的大面积流气式电离室,通过探测α粒子电离空气的原理进行多孔样品的间接无损测量,方法探测限低,可以分析放射性活度低至百Bq级别的样品板。In the process of decommissioning of nuclear facilities,the nondestructive measurement of transuranic nuclide radioactive samples is generally realized by gamma spectrometry.However,the detection limit of this measurement method is high and it is not suitable for the measurement of low-level radioactive samples after dissolution because the probability of transuranic nuclide gamma ray emission is generally low.The method based on large area flow gas ionization chamber was established in this work and can be used for indirect nondestructive measurement of surface irregular samples by detecting the principle ofαparticle ionized air.The detection limit of the method is low,and the sample plate with radioactivity as low as 100 Bq can be analyzed.

关 键 词：超铀核素 无损测量 流气式电离室 

分 类 号：P204[天文地球—测绘科学与技术]