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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Excitation of N2(B 3Πg) in the nitrogen short-lived afterglow
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Excitation of N2(B 3Πg) in the nitrogen short-lived afterglow

机译：氮短寿命余辉中N2（B3Πg）的激发

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摘要

The excitation of the N2(B 3Πg) state in microwave discharges ignited in flowing nitrogen and in their short-lived afterglow is investigated. Simultaneous measurements in the post-discharge on this species and the N~(2+)(B 2Σu+) ion through emissions, and also on the electronic ground state of N2 by spontaneous Raman scattering, provide information of their vibrational distribution function. A spatial study has been carried out, showing a quite slow evolution of the vibrational populations along the short-lived afterglow, and in particular the first proof of a steady vibrational distribution of N2(X 1Σg+) from the beginning to the bulk of this ionized region. The N2(B 3Πg vibrational distribution is analysed by a steady-state kinetic model taking into account all the B state excitation processes, i.e. electron collisions and reactions between molecular excited states, and quenching. The reaction between the vibrationally excited N2(X 1Σg+) and N2(A 3Σu+) is shown to be the pre-eminent excitation mechanism in the short-lived afterglow.
机译：研究了流动氮气中点燃的微波放电及其短寿命余辉中N2（B3Πg）态的激发。对该物种和通过发射的N〜（2 +）（B2Σu+）离子以及通过自发拉曼散射对N2的电子基态进行后放电的同时测量，可提供有关其振动分布函数的信息。进行了空间研究，结果表明，沿短寿命余辉的振动种群的发展相当缓慢，尤其是从电离的开始到大量N2（X1Σg+）的稳定振动分布的第一个证据。地区。通过考虑所有B态激发过程（即电子碰撞和分子激发态之间的反应以及猝灭）的稳态动力学模型，分析了N2（B3Πg）的振动分布。振动激发的N2（X1Σg+）之间的反应N2（A3Σu+）被证明是短暂余辉中的主要激发机制。

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