福岛核事故期间浙江地区大气中氙的监测

浙江省辐射环境监测站在福岛核事故期间开展了浙江地区大气中放射性惰性气体氙的应急监测工作,期间共采集大气样品86个,分析了4种氙同位素.监测结果表明,从3月25日开始,大气中133 Xe 、131m Xe浓度较本底有明显的上升,3月28日达到峰值,其后逐渐下降,与相同点位采集的气溶胶样品中的131 I活度浓度变化基本一致;133m Xe 、135 Xe浓度较本底值的变化不明显.

Emergency Monitoring of Radioactive Noble Gas Xenon from Event of Nuclear Leakage in Japan

This article introduces the emergency monitoring of radioactive noble gas xenon during the event of nuclear leakage in Japan.86 air samples were collected,and 4 xenon isotopes including the 131Xe,133mXe,133Xe,135Xe were analyzed. The Monitoring results show that,the concentrations of 133Xe and 133mXe increase significantly compared with the background from the March 25,and reach the top of the trend on March 28 and then decreased gradually;the variation trend of concentrations of the radioactive noble gas xenon is similar to the that of the 131I concentrations in the aerosol samples;But the concentrations of the 133mXe,135Xe have not changed significantly compared with the background.