Mean energy of water molecule ionization by electron impact

Abstract

The cost of ionization of a water molecule by an electron impact is calculated on the basis of two models with identical initial data and compared with available data from the literature. The results of calcu lations show that the ionization cost for the model with a monoenergetic beam with E = 1000 eV is W = 25.26 eV; for the model taking into account the electron energy distribution function in a plasma with T e = 100 eV, this value is W = 16.85 eV.

Disproportionation of nitrogen induced by DC plasma-driven electrolysis in a nitrogen atmosphere

“…However, water vapor influences the discharge properties complexly in many aspects, influencing for instance the inelastic collisional mechanisms 65,66 or the electron density and electron energy distribution function, given the different ionization potential between nitrogen (15.58 eV) 67 and water (12.62 eV). 68…”

“…However, water vapor influences the discharge properties complexly in many aspects, influencing for instance the inelastic collisional mechanisms 65,66 or the electron density and electron energy distribution function, given the different ionization potential between nitrogen (15.58 eV) 67 and water (12.62 eV). 68 Fig. 3 Temporal evolution of the (volumetric) concentration of NO (a) and H 2 (b) in the gas outlet of the vessel following plasma ignition and (c) the corresponding molar fraction of H 2 O in the gas phase, for different plasma-electrolysis currents.…”

Analogue spectra for impact ionization mass spectra of water ice grains obtained at different impact speeds in space

“…A similar mechanism may dominate the abundant cation formation from water ice grains at impact speeds as low as 3 km/s observed by Cassini's CDA. The dissociation energy of water (492.2 kJ/mol) is under half its ionization energy (1183 kJ/mol), which is less than that of hydrogen (1312 kJ/mol). It is therefore highly unlikely that significant quantities of [H 3 O] + or [H] + ions can form by direct ionization at such low impact speeds .…”

Application of elements of quantum mechanics in analysing AC conductivity and determining the dimensions of water nanodrops in the composite of cellulose and mineral oil

“…Due to the fact that the valence electron of a molecule of water is strongly shielded from the nucleus through lower electrons, its first ionisation energy is about 12.6 eV (Mallard and Linstrom 2000;Shirai et al 2001;Zavilopulo et al 2005;Kovtun 2015) and is very similar to the ionization energy of a hydrogen atom of 13,595 eV. The difference between these values is only 7.3%.…”