Electron-impact dissociation cross sections of vibrationally excited He2+ molecular ion

Dissociative electron attachment and electron-impact resonant dissociation of vibrationally excited O2 molecules

State-by-state cross sections for dissociative electron attachment and electron-impact dissociation for molecular oxygen are computed using ab initio resonance curves calculated with the R-matrix method. When O2 is in its vibrational ground state, the main contribution for both processes comes from the $^2Π_u$ resonance state of $O_2^-$ but with a significant contribution from the $^4Σ$ resonant state. Vibrational excitation leads to an increased contribution from the low-lying $^2Π_{g}$ resonance, greatly increased cross sections for both processes, and the threshold moving to lower energies.…

Dissociative electron attachment cross sections for ro-vibrationally excited NO molecule and N- anion formation

Motivated by the huge need of data for non-equilibrium plasma modeling, a theoretical investigation of dissociative electron attachment to the NO molecule is performed. The calculations presented here are based on the Local-Complex-Potential approach, taking into account five NO$^-$ resonances. Three specific channels of the process are studied, including the production of excited nitrogen atoms $\mathrm{N}(^2\mathrm{D})$ and of its anions N$^-$. Interpretation of the existing experimental data and their comparison with our theoretical result are given. A full set of ro-vibrationally-resolved …

Electron-impact resonant vibrational excitation and dissociation processes involving vibrationally excited N2 molecules

Resonant vibrational excitation cross sections and the corresponding rate coefficients for electron-N$_2$ collisions occurring through the N$_2^-(\textrm{X}\ ^2Π_g)$ resonant state are reviewed. New calculations are performed using accurate potential energies curves for the N$_2$ electronic ground state, taken from literature, and for the N$_2^-$ resonant state, obtained from $R$-matrix calculations. The calculations are extended also to the resonant excitation processes involving the N$_2$ ground state vibrational continuum, leading to dissociation. Electron impact dissociation is found to be…

Isotopic and vibrational-level dependence of H$_2$ dissociation by electron impact

The low-energy electron-impact dissociation of molecular hydrogen has been a source of disagreement between various calculations and measurements for decades. Excitation of the ground state of H$_2$ into the dissociative $b ^3Σ_u^+$ state is now well understood, with the most recent measurements being in excellent agreement with the molecular convergent close-coupling (MCCC) calculations of both integral and differential cross sections (2018 Phys. Rev. A 98 062704). However, in the absence of similar measurements for vibrationally-excited or isotopically-substituted H$_2$, cross sections for d…

电子碰撞氘分子的振动激发与解离

Vibrational excitation and dissociation of deuterium molecule by electron impact

本文使用局部复势方法研究电子-D2共振碰撞，给出了涉及基态和前两激发态的振动分辨截面，并考虑激发态间跃迁，为聚变等离子体偏滤器分离状态提供数据。

热力学一致的振动-电子加热：激发态人口的广义推导

Thermodynamically Consistent Vibrational-Electron Heating: Generalized Derivation for Excited State Populations

本文提出了一种热力学一致的振动-电子加热模型，通过广义推导扩展了电子温度与振动温度的关系，适用于振动激发态显著影响电子冷却的等离子体流动。