Electron-neutral collision cross sections for H₂O: I. Complete and consistent set

Abstract

This work proposes a complete and consistent set of cross sections for electron collisions with water molecules to be published in the IST-Lisbon database on LXCat. The set is validated from the comparison between experimental and computed electron swarm parameters. The former are collected from literature while the latter are calculated using a space-homogeneous two-term Boltzmann solver, assuming isotropic scattering in inelastic collisions. Rotational cross sections, based on the Born approximation, are optimised by means of the electron swarm analysis technique. Superelastic rotational and vibrational collisions are accounted for in the calculations and found to be particularly important for low-energy electrons interacting with water molecules. The set can be used with codes assuming space-homogeneous conditions, in particular common two-term Boltzmann solvers, ensuring a good agreement with experiments. Therefore, it constitutes an important tool for fast calculations and modelling of complex plasma chemistries.

Two- and three-body attachment, electron transport and ionisation in water-air mixtures

“…The present data may also be useful for modelling discharges in the field of bioplasmas and that of plasmas in medicine. Finally, from the point of view of basic physics, these data could be of particular interest in the fields of testing or derivation of cross sections, particularly in the case of H 2 O, for which a recent article has stressed the need for more cross section data [31].…”

CO2/CH4 glow discharge plasma. Part I: Experimental and numerical study of the reaction pathways

“…The various processes included in the sets on the IST-Lisbon LXCat sets were described in [39] for CO 2 , in [40] and in [41] for O 2 and O and in [42] for CO. For the computation of the EEDF, elastic collisions, electronic excitation, vibrational excitation and dissociation are included in the sets. The water cross-sections are taken from [43], where a set of complete and consistent H 2 O cross-sections validated against the swarm parameters was made publicly available for the Ąrst time. The CH 4 cross-section are taken from [44].…”

Determination and assessment of a complete and self-consistent electron-neutral collision cross-section set for the C4F7N molecule

“…However, there is no published comprehensive cross-section set available for C 4 F 7 N, as far as the present authors are aware. Here, comprehensiveness is often defined by two requirements: completeness and consistency [24][25][26][27]. A complete cross-section set accurately represents all electron energy and momentum losses as well as electron number changing processes such as ionization and attachment.…”