当前位置: X-MOL 学术Plasma Sources Sci. Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Rydberg states population via three-body and dissociative recombination in low-temperature plasmas of rare gas mixtures
Plasma Sources Science and Technology ( IF 3.3 ) Pub Date : 2019-12-23 , DOI: 10.1088/1361-6595/ab652f
Vladimir S Lebedev , Konstantin S Kislov , A A Narits

We study various physical mechanisms of electron-ion recombination accompanied by the formation of Rydberg atoms in plasmas containing atomic and molecular ions. Analytical approach to the description of resonant mechanism of ternary electron capture associated with the non-adiabatic energy transfer from free electron to the electronic shell of a quasimolecular ion is developed. Similar technique is used for the evaluation of the integral contribution of all rovibrational states of a bound molecular ion to the Boltzmann-averaged cross section and rate constant of dissociative recombination. Simple expressions for cross sections and rate constants of non-resonant electron capture to Rydberg states in ternary electron-ion-atom collisions are derived in the impulse approximation. We perform a comparative analysis of the efficiencies of resonant and non-resonant three-body recombination of electrons with atomic ions and dissociative recombination of molecular ions in plasmas of rare gas mixtures, Rg/Xe, with small relative concentration of xenon ([Xe]$\ll$[Rg], Rg=He, Ne, Ar, Kr). It is shown that in a wide range of plasma parameters the resonant recombination mechanisms are predominant. The behavior and magnitudes of the recombination rate constants turn out to be quite different for heteronuclear ions with small (HeXe+ and NeXe+, D0=13.1 and 33 meV) and moderate (ArXe+ and KrXe+, D0=171 and 400 meV) values of the dissociation energy.

中文翻译:

Rydberg 通过稀有气体混合物的低温等离子体中的三体和解离复合来说明种群

我们研究了伴随着里德堡原子在含有原子和分子离子的等离子体中形成的电子-离子复合的各种物理机制。开发了描述与从自由电子到准分子离子的电子壳层的非绝热能量转移相关的三元电子捕获共振机制的分析方法。类似的技术用于评估结合分子离子的所有振动状态对玻尔兹曼平均截面和解离复合速率常数的积分贡献。在脉冲近似中导出了三元电子 - 离子 - 原子碰撞中非共振电子捕获到里德堡态的横截面和速率常数的简单表达式。我们对稀有气体混合物的等离子体中电子与原子离子的共振和非共振三体复合和分子离子的解离复合的效率进行了比较分析,Rg/Xe,氙的相对浓度较小([Xe] $\ll$[Rg],Rg=He、Ne、Ar、Kr)。结果表明,在广泛的等离子体参数中,共振重组机制占主导地位。对于具有小(HeXe+ 和 NeXe+,D0=13.1 和 33 meV)和中等(ArXe+ 和 KrXe+,D0=171 和 400 meV)解离值的异核离子,复合速率常数的行为和大小非常不同活力。氙的相对浓度较小([Xe]$\ll$[Rg],Rg=He、Ne、Ar、Kr)。结果表明,在广泛的等离子体参数中,共振重组机制占主导地位。对于具有小(HeXe+ 和 NeXe+,D0=13.1 和 33 meV)和中等(ArXe+ 和 KrXe+,D0=171 和 400 meV)解离值的异核离子,复合速率常数的行为和幅度结果是完全不同的活力。氙的相对浓度较小([Xe]$\ll$[Rg],Rg=He、Ne、Ar、Kr)。结果表明,在广泛的等离子体参数中,共振重组机制占主导地位。对于具有小(HeXe+ 和 NeXe+,D0=13.1 和 33 meV)和中等(ArXe+ 和 KrXe+,D0=171 和 400 meV)解离值的异核离子,复合速率常数的行为和大小非常不同活力。
更新日期:2019-12-23
down
wechat
bug