计量学报2016，Vol.37Issue(z1)：124-128,5.DOI:10.3969/j.issn.1000-1158.2016.z1.29
冷凝氡源的α能谱特性与活度计算方法研究
Research on the α-energy Spectrum and the Calculating Method of the Activity of Condensate Radon Source
摘要
Abstract
A new kind of absolute measurement device of radon,which is establish by National Institute of Metrology (NIM),was used to research the differences of the α-energy spectrum of the condensate radon by changing vacuum pressure and the temperature of the cold finger.A method for calculating the activity of radon source accurately in the condition of that the resolution of spectrum is changing due to the foreign gases were introduced into the condensation chamber inevitably as time goes on.The results show that when the radon source was condensed,the foreign gases will decrease theresolution of spectrum.but use the method that is established according to the decay characteristic of radon and its progeny to calculate the activity of radon source,the result get from repeated measuring shows the consistency is within 0.45％ in 5 hours,this is significant for the international comparison and quantity transmission of the activity of radon关键词
计量学/氡活度/冷凝氡源/α能谱/绝对测量/小立体角法Key words
metrology/radioactivity of radon/condensed radon source/α-energy spectrum/absolute measurement/defined angle method分类
通用工业技术引用本文复制引用
李泽西,梁珺成,王沥苑,袁大庆,李斌..冷凝氡源的α能谱特性与活度计算方法研究[J].计量学报,2016,37(z1):124-128,5.基金项目
国家自然科学基金(11505179) （11505179）
