Interference effects for intermediate energy electron-impact ionization of H2 and N2 molecules

Zehra Nur Ozer,Don Madison,Hari Chaluvadi,Mevlut Dogan

doi:10.1088/1742-6596/601/1/012003

Abstract

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.

Highlights

Electron impact ionization cross sections have been measured and calculated since the early days of collision physics due to the wealth of information that can be obtained about the collision dynamics and due to their relevance in many application areas
Young type interference effects resulting from the coherent superposition of the scattered waves from two atomic centers were predicted by Stia et al [2,3] and by Gao et al [4] for electron impact ionization of molecular H2 and molecular N2, respectively
As an extension of this study, we have examined electron impact ionization of N2 molecules at intermediate energies to look for interference effects both experimentally and theoretically

Summary

Missouri University of Science and Technology

Interference Effects for Intermediate Energy Electron-Impact Ionization of H2 and N2 Molecules. Part of the Numerical Analysis and Scientific Computing Commons, and the Physics Commons. N. Ozer et al, "Interference Effects for Intermediate Energy Electron-Impact Ionization of H2 and N2 Molecules," Journal of Physics: Conference Series, vol 601, no. 1, Institute of Physics Publishing, Jul 2015. Interference effects for intermediate energy electron-impact ionization of H2 and N2 molecules. Zehra Nur Ozer, Hari Chaluvadi, Don Madison and Mevlut Dogan1 1Department of Physics, e-COL Laboratory, Afyon Kocatepe University, 03200, Afyonkarahisar, Turkey 2Department of Physics, Missouri University of Science and Technology, Rolla, Missouri, USA

Introduction

Published under licence by IOP Publishing Ltd

Results and Discussion