三光子逐步激光共振电离质谱测定镥同位素比值  

Determination of Lutetium Isotopic Ratio Using Three-Photon Stepwise Resonance Ionization Mass Spectrometry

作　　者：李志明[1] 邓虎[1] 朱凤蓉[1] 张子斌[1] 翟利华[1] 任向军[1] 

机构地区：[1]西北核技术研究所激光共振电离质谱实验室,陕西西安710024

出　　处：《质谱学报》2002年第3期156-159,共4页Journal of Chinese Mass Spectrometry Society

摘　　要：本文通过速率方程数值模拟计算和实验相结合的方法 ,研究各种激光参数对镥同位素激光诱导同位素歧视效应的影响。激光诱导同位素歧视效应主要来源于激光第二步跃迁几率的差异 ,本研究提出了减少和消除这一效应的方法。利用这一方法 ,对天然镥样品同位素比值进行测定 。The dependences of laser-induced isotopic discrimination effect on some of laser parameters were studied by the experimental and theoretical methods. This effect mainly stems from the discrepancy of the second-step transition probability between different isotopes. The method by which this effect is lessened or eliminated is given. The isotopic ratios of nature lutetium sample are determined by this method. The experimental results present that the degree of the laser induced isotopic discrimination of lutetium isotope can be lessened by this method.

关 键 词：三光子逐步激光共振电离质谱 测定 镥同位素 比值 激光诱导同位素歧视效应 

分 类 号：O614.347[理学—无机化学] O657.63[理学—化学]