We present experimental and theoretical results for the electron-impact ionization of the highest occupied molecular orbitals of tetrahydropyran and 1,4-dioxane. Using an (e,2e) technique in asymmetric coplanar kinematics, angular distributions of the slow ejected electron, with an energy of 20 eV, are measured when incident electrons at 250 eV ionize the target and scatter through an angle of either -10° or -15°. The data are compared with calculations performed at the molecular 3-body distorted wave level. Fair agreement between the theoretical model and the experimental measurements was observed. The similar structures for these targets provide key insights for assessing the limitations of the theoretical calculations. This study in turn facilitates an improved understanding of the dynamics in the ionization process.



Research Center/Lab(s)

Center for High Performance Computing Research

Keywords and Phrases

Angular Distribution; Ethers; Impact Ionization; Coplanar Kinematics; Ejected Electrons; Electron-Impact Ionization; Highest Occupied Molecular Orbital; Incident Electrons; Ionization Process; Theoretical Calculations; Theoretical Modeling; Polyols; 1,4-Dioxane; Dioxane Derivative; Pyran Derivative; Biomechanics; Chemistry; Electron; Quantum Theory; Thermodynamics; Biomechanical Phenomena; Dioxanes; Electrons; Pyrans; Quantum Theory; Thermodynamics

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

File Type





© 2014 American Institute of Physics Inc., All rights reserved.

Publication Date

01 Jan 2014