【作者】 肖德涛； 周剑良； 丘寿康； 赵桂芝； 单健； 康玺； 周青芝； 肖拥军； 孟冶成； 刘良军； 唐泉； 刘小松； 熊信明；

【Author】 XIAO De-tao,ZHOU Jian-liang,QIU Shou-kang,ZHAO Gui-zhi, SHAN Jian,KANG Xi,ZHOU Qing-zhi,XIAO Yong-jun, MENG Ye-cheng,LIU Liang-jun,TANG Quan, LIU Xiao-song,XIONG Xin-min (School of Nuclear Science and Technology,NanHua university,Hengyang 421001)

【机构】 南华大学氡湖南省重点实验室；

【摘要】 氡同位素及其子体是人类遭受的最大单个照射源,约占全球天然辐射源照射贡献的50%以上,其中²²⁰Rn及其子体所致剂量约占氡剂量的9%。氡同位素及其子体计量是开展与氡相关研究及应用的基础。南华大学氡湖南省重点实验室是我国主要的氡计量研究机构,近十几年来对²²⁰Rn及其子体测量仪刻度与实验装置进行了大量研究,研制了用于量值传递的高射气系数且与气候参数无关的流气式固体²²⁰Rn源,研究了用于²²²Rn/²²⁰Rn混合气体定值的双闪烁室流气延时法和单闪烁室流气静态法、用于混合²²²Rn/²²⁰Rn子体定值的α能谱数据重建自动测量方法等,在此基础上实验室已建立了能调控温度、湿度、气溶胶浓度以及²²²Rn/²²⁰Rn及其子体浓度的装置(即²²⁰Rn室)。实验及应用结果表明,该装置建立的²²²Rn/²²⁰Rn及其子体大气样品稳定、参考水平定值准确,可作为建立国家计量标准装置的基础。更多还原

【Abstract】 Radon and its daughters are the biggest radiation source to human beings,which dose is about 50 percent of the total human dose.And the dose from thoron and its daughters is 9 percent of the radon induced dose.The construction of the radon and its daughters dosimetry system is the foudation to develop the applying reseach of radon and its relate technology.The radon laboratory in NanHua University HuNan province is the main radon dosimetry research institutions inside,which gave a systemic study on the measurement and calibration of the thoron and its daughters.A thoron chamber with 2.7m~3 volume was built recently,in which the temperature,the humidity,aerosol density and the concentration of thoron and its daughters could be adjusted.For the purpose of the dosimetry standard transmission flow solid source of thoron with high emanation coefficient was developed.Also a serial methods such as method of measurement for radon and thoron using the double scintillation cell with flow delay time,method of measurement for radon and thoron concentration by a scintillation cell and alpha spectrum superposition method for measuring radon and thoron progenies in air were proposed,which form the standard measurement and calibration basis of the thoron.更多还原