Low-Energy Electron Scattering from Atomic Nitrogen

Abstract

The total cross section for the scattering of electrons by atomic nitrogen has been measured as a function of electron energy from 1.6 to 10 eV. An electron gun was developed that produced a more intense beam of electrons than was used for similar experiments with atomic hydrogen and atomic oxygen. The number of electrons scattered from a region de6ned by the intersection of an electron beam and a modulated molecular nitrogen beam was compared with the number scattered when the nitrogen beam was partially dissociated. A pulsed dc discharge dissociated about 20~jo of the molecules. The degree of dissociation was measured with a mass spectrometer. From the data, the ratios of atomic to molecular scattering cross sections were obtained. The absolute atomic values were calculated by multiplying these ratios by the molecular nitrogen cross sections obtained by Normand. The results are compared with theoretical estimates of the cross section.

R-Matrix Theory of Atomic and Molecular Processes

“…At higher energies all calculations including MC calculations of Ormonde et ale (29) are in poor accord with the measurements of Neynaber et al (30) and further experiments would be desirable.…”

Net emission coefficient for CO–H2 thermal plasmas with the consideration of molecular systems

“…When the electron interacts with an atom, as described in [77], the calculation of the monochromatic emission coefficient requires the knowledge of the cross section of the electron-atom collision. We used the total cross sections issued from Neynaber et al [88][89][90] and Robinson and Geltman [83] for oxygen, carbon and hydrogen.…”

Collision integrals in transport properties calculation of air

“…The hard sphere model was used for electron-neutral interactions except the species: Ar, N, O, N 2 , O 2 , NO. For these species the data of the momentum transfer cross section were used [11], [12], [13]. The results of the transport properties of air (the electrical conductivity, the thermal conductivity and the viscosity) for the different ways of the collision integral calculation are presented in Fig.…”

“…2 -method 1 except of interactions electron -Ar, N, O, N 2 , O 2 , NO [11], [12], [13]. 3 -method 2 except of O-O + interaction [8].…”