EFFECT OF DRIFT GAS ON MOBILITY OF IONS
EFFECT OF DRIFT GAS ON MOBILITY OF IONS
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DOI：
10.1021/j100345a030
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发表时间：
1989-04-20
影响因子：
--
通讯作者：
BERANT, Z
中科院分区：
文献类型：
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作者：
KARPAS, Z;BERANT, Z
考察了漂移气体对离子迁移率的影响。在普遍接受的模型中，用硬核势来表示离子和漂移气体分子之间的相互作用。1·2*漂移气体的影响体现在折合质量项和碰撞截面项中。一系列漂移气体的使用，即氦、氮、空气、氩、二氧化碳和六氟化硫，使得区分质量效应和极化效应成为可能。因此，我们发现在理论模型中增加一个修正项可以提高与实验数据的一致性。这种与质量有关的项抵消了减少质量项的重离子对离子质量微小变化的敏感度的损失。漂移气体分子的质量和极化率越低，这种修正的重要性就越大。
The effects of the drift gas on the mobility of ions were examined. In the generally accepted model, a hard-core potential is used to represent the interaction between the ionand drift gas molecules. 1· 2* The effects of the drift gas are manifested in the reduced-mass term and in the collision cross-section term. Use of a series of drift gases, namely, helium, nitrogen, air, argon, carbon dioxide, and sulfur hexafluoride, made it possibleto distinguish between mass effects and polarizability effects. Thus, it was found that addition of a correction term to the theoretical model improves the agreement with experimental datá. This mass-dependent term counterbalances the loss of sensitivity to small changes in ion mass for heavy ions of the reduced-mass term. The lower the mass and polarizability of the drift gas molecules the greater the importance of this correction.