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钐、钕、铕等稀土元素在热表面电离质谱中的发射电离规律研究
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摘要
~(151)Sm作为长寿命裂变产物具有重要的分析价值。在热表面电离质谱测量中,Sm会受到Eu、Nd的干扰。开展了Sm和主要干扰元素Eu、Nd等在热电离质谱中的激发电离规律研究。实验样品采用天然Sm、Eu、Nd配制的混合样品,双带测量模式,详细考察了各种带电流搭配下Sm、Eu、Nd离子流信号的变化情况。通过降低电离带电流和增加蒸发带电流的方式可以有效地压低Nd的发射电离从而排除Nd的干扰。
~(151)Sm is worthy of be analysed as long-lived fission product.Sm is disturbed by Eu and Nd in Thermal Ionization Mass Spectrometry.The study on the emission-ionization rule of Sm,Eu and Nd in TIMS.Using mixed sample of natural Sm,Eu and Nd,with double-filaments mode,the ion signal behavior was researched under various filament current.Nd' disturbance can be eliminated because Nd'emission and ionization be weakened through reducing Ionization-filament current and increasing Evaporation-filament current.
引文
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