摘要
本文通过对福岛核事故期间应急监测工作的总结,发现了应急监测期间气溶胶样品γ核素分析结果需修正。样品中短半衰期核素,特别是采样时间和测量时间较长的样品需进行衰变修正,给出了采样、放置、测量时间衰变修正因子。在分析气溶胶样品中放射性核素活度浓度时,需考虑滤膜收集效率修正,文中采用双滤膜法给出了两种常用滤膜的收集效率。针对气溶胶中^(137) Cs的分析,介绍了有干扰峰的γ能谱解谱方法,并提出了分析气溶胶样品时降低干扰的措施。本文对气溶胶样品γ核素分析结果的修正方法,可为全国性核事故应急监测提供参考。
In the paper,some corrections ofγnuclide analyzing result for Fukushima nuclear accident emergency monitoring aerosol sample were presented according to sumup of emergency monitoring work.The analyzing result of short half-life nuclide samples,especially for the samples needed long time to collect and measure,need be corrected owing to decay.The collecting time correction,laying time correction and measuring time correction factors were given.The filtration efficiency correction need be considered when the radioactive nuclide activity concentration in aerosol sample was analyzed.The filtration efficiencies of two kinds of common filters were given by using the methodof double filters in this paper.The method of analyzing radioactive nuclide ^137Cs in aerosol,whoseγray spectrum is interfered,was introduced,and the means of depressing interference peak for aerosol sample were presented.The method ofγnuclide analyzing result correction for aerosol sample can provide reference for nationwide nuclear accident emergency monitoring.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2016年第4期720-724,共5页
Atomic Energy Science and Technology
关键词
衰变修正
滤膜收集效率
干扰峰
decay correction
filtration efficiency
interference peak
