The near-threshold associative ionization N(2D)+O(3P) → NO+(X1Σ+)+e− reaction

Голубков, Г. В.; Ozerov, G. K.

doi:10.1134/s1028335814030094

Cited by 7 publications

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“…, and NO), and electrons (e). As a distinctive feature, the model incorporated an exoergic associative ionization reaction with the participation of N( 2 P) atoms [18,19] and a near-threshold reaction with the participation of N( 2 D) atoms with a low activation barrier of 0.38 eV [20,21], which can be described as:…”

Section: Modeling Of An Atmospheric-pressure Air Glow Discharge Operamentioning

confidence: 99%

Modelling of an Atmospheric–Pressure Air Glow Discharge Operating in High–Gas Temperature Regimes: The Role of the Associative Ionization Reactions Involving Excited Atoms

Cejas

Mancinelli

Prevosto

2020

Plasma

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A model of a stationary glow-type discharge in atmospheric-pressure air operated in high-gas-temperature regimes (1000 K < Tg < 6000 K), with a focus on the role of associative ionization reactions involving N(2D,2P)-excited atoms, is developed. Thermal dissociation of vibrationally excited nitrogen molecules, as well as electronic excitation from all the vibrational levels of the nitrogen molecules, is also accounted for. The calculations show that the near-threshold associative ionization reaction, N(2D) + O(3P) → NO+ + e, is the major ionization mechanism in air at 2500 K < Tg < 4500 K while the ionization of NO molecules by electron impact is the dominant mechanism at lower gas temperatures and the high-threshold associative ionization reaction involving ground-state atoms dominates at higher temperatures. The exoergic associative ionization reaction, N(2P) + O(3P) → NO+ + e, also speeds up the ionization at the highest temperature values. The vibrational excitation of the gas significantly accelerates the production of N2(A3∑u+) molecules, which in turn increases the densities of excited N(2D,2P) atoms. Because the electron energy required for the excitation of the N2(A3∑u+) state from N2(X1∑g+, v) molecules (e.g., 6.2 eV for v = 0) is considerably lower than the ionization energy (9.27 eV) of the NO molecules, the reduced electric field begins to noticeably fall at Tg > 2500 K. The calculated plasma parameters agree with the available experimental data.

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Section: Modeling Of An Atmospheric-pressure Air Glow Discharge Operamentioning

confidence: 99%