Transport Properties and Ion Velocity Distribution Functions for Diatomic Ions in Neutral Gases under the Influence of Electric Fields

电场影响下中性气体中双原子离子的输运特性和离子速度分布函数

• 批准号: 9117158
• 负责人: Larry Viehland
• 金额: $ 6.84万
• 依托单位: Saint Louis University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-01 至 1995-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117158&HistoricalAwards=false
• 关键词: Transport; Properties; Ion; Velocity; Distribution

Professor Larry A. Viehland is supported by a grant from the Theoretical and Computational Chemistry Program to study the way diatomic ions move through dilute gases under the influence of electric fields. The appropriate Boltzmann-like kinetic equation will be solved in order to systemmatically approximate the ion mobility and diffusion coefficients for comparison with experiments. The calculations will be extended to the determination of the ion velocity distribution functions. This will allow calculation of the reaction rate coefficients measured in swarm experiments and provide an assessment of the accuracy of our knowledge of diatomic ion/molecule reaction cross sections. %%% A thorough understanding of interaction between ions and neutral molecules is important in such fields as atomic and molecular physics, aeronomy and atmospheric chemistry, gaseous electronics, and laser physics. Viehland studies the mobility and diffusion of ions moving through trace amounts of dilute gases under the influence of an electric field. These conditions are frequently encountered in laboratories where ion molecule reactions are studied.

Larry a . Viehland教授得到了理论与计算化学计划的资助，研究双原子离子在电场影响下通过稀释气体的方式。求解合适的类玻尔兹曼动力学方程，以便系统地近似离子迁移率和扩散系数，以便与实验比较。计算将扩展到确定离子速度分布函数。这将允许计算在群体实验中测量的反应速率系数，并提供我们对双原子离子/分子反应截面知识的准确性评估。透彻理解离子和中性分子之间的相互作用在原子和分子物理学、航空和大气化学、气体电子学和激光物理学等领域是很重要的。Viehland研究离子在电场影响下通过微量稀释气体的迁移率和扩散。这些情况在研究离子分子反应的实验室中经常遇到。