We have studied electron impact ionization of H2 and N2 molecules at intermediate energies to look for possible two center interference effects experimentally and theoretically. Here we report a study of the interference factor I for 250 eV electron-impact ionization. The experimental measurements are performed using a crossed-beam-type electron-electron coincidence spectrometer and theoretical calculations are obtained using the Molecular Three Body Distorted Wave Approximation (M3DW). We found that the I-factor demonstrated strong evidence for two-center interference effects for both H2 and N2. We also found that the I-factor is more sensitive to projectile angular scans than to ejected electron energy scans which indicate that for the present set of kinematics the diffraction of the projectile from two scattering centers is more important than interference between electron waves emitted from two different centers.

Meeting Name

International Conference on Many Particle Spectroscopy of Atoms, Molecules, Clusters and Surfaces (2014: Jul. 15-18, Metz, France)



Research Center/Lab(s)

Center for High Performance Computing Research

Keywords and Phrases

Electron Energy Levels; Electron Scattering; Electrons; Ionization; Molecules; Particle Spectrometers; Projectiles; Spectrometers; Distorted Wave Approximations; Electron Impact-Ionization; Electron-Electron Coincidences; Interference Effects; Intermediate Energies; Intermediate-Energy Electrons; Theoretical Calculations; Two-Center Interference; Impact Ionization

International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2015 Institute of Physics - IOP Publishing, All rights reserved.

Publication Date

01 Jul 2015