【摘要】 以热表面电离质谱计为分析手段,采用6Li稳定同位素示踪了爆炸过程中放射性气溶胶粒子悬浮、沉积和在毛细管中扩散行为.实验结果表明:爆炸后100h,气溶胶粒子悬浮份额占10-5;沉积量占绝大多数,且各部位沉积量存在明显差异;即使在无压力推动下,仍明显观察到气溶胶粒子在毛细管中的扩散,对于d25μm×2cm毛细管通道而言,穿透率为1.5×10-10/h.研究结果对于正确评估放射性气溶胶粒子在爆炸过程中的行为有一定的价值.更多还原

【Abstract】 The suspension,deposition and diffusion of aerosol particles under explosion condition was measured with thermal ionization mass spectrometry by stable isotope（（）⁶Li） tracing technology.It is shown that the suspension rate is only 10^-5,the deposition dominates others and the penetration through d25μm×2cm capillary tube is(1.5×10^-10/h) under no pressure after explosion 100h.The results obtained are important in leakage evaluation of radioactive aerosol particles under explosion condition.更多还原