Low-energy (E0 0=65eV) electron-impact single ionization of Ne (2p) has been investigated to thoroughly test state-of-the-art theoretical approaches. The experimental data were measured using a reaction microscope, which can cover nearly the entire 4π solid angle for the secondary electron emission energies ranging from 2 to 8 eV, and projectile scattering angles ranging from 8.5⁰ to 20.0⁰. The experimental triple-differential cross sections are internormalized across all measured scattering angles and ejected energies. The experimental data are compared to predictions from a hybrid second-order distorted-wave Born plus R-matrix approach, the distorted-wave Born approximation with the inclusion of postcollision interaction (PCI), a three-body distorted-wave approach (3DW), and a B-spline R-matrix (BSR) with pseudostates approach. Excellent agreement is found between the experiment and predictions from the 3DW and BSR models, for both the angular dependence and the relative magnitude of the cross sections in the full three-dimensional parameter space. The importance of PCI effects is clearly visible in this low-energy electron-impact ionization process.



Research Center/Lab(s)

Center for High Performance Computing Research

Keywords and Phrases

Born Approximation; Distortion (Waves); Electron Emission; Electron Scattering; Electrons; Forecasting; Ionization; Matrix Algebra; Molecular Physics; Secondary Emission; Distorted Wave Born Approximation; Full Three-Dimensional; Low-Energy Electron-Impact Ionization; Post-Collision Interaction; Secondary Electron Emissions; Theoretical Approach; Three-Dimensional Kinematics; Triple Differential Cross Sections; Impact Ionization

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

File Type





© 2015 American Physical Society (APS), All rights reserved.

Publication Date

01 Mar 2015