Doctoral Dissertations


Electron-impact ionization of molecules


Junfang Gao

Keywords and Phrases

Distorted wave impulse approximation


"Electron-impact ionization of molecules has been a fascinating and intriguing subject for decades. For high incident-electron energy ( ̃thousand eV), the collision dynamics has been well described by the plane wave impulse approximation (PWIA) for most molecules. For intermediate and low incident-electron energy ( ̃hundreds-tens eV) collisions, currently there has been no reliable theoretical approach for studying the micro ionization mechanism. In this dissertation, new distorted wave impulse approximation (DWIA) and molecular three-body approximation (M3DW) are proposed which use an orientation averaged molecular orbital (OAMO) to average all molecular orientations in T-matrix. The new theoretical approaches are used to calculate fully differential cross sections (FDCS) for intermediate and low energy electron-impact ionization of molecules"--Abstract, page iv.


Madison, Don H.

Committee Member(s)

Peacher, Jerry
Schulz, Michael, 1959-
Hale, Barbara N.
Sinn, Ekkehard
Knight, W. Nicholas (William Nicholas), 1939-



Degree Name

Ph. D. in Physics


University of Missouri--Rolla

Publication Date

Spring 2006

Journal article titles appearing in thesis/dissertation

  • Distorted wave impulse approximation
  • Elementary method for calculating orientation-averaged fully differential electron-impact ionization cross section for molecules
  • Distorted wave born and three-body distorted wave born approximation calculations of the fully differential cross section for electron-impact ionization of nitrogen molecules
  • Fully differential cross sections for low energy electron-impact ionization of nitrogen molecules
  • Interference effects for low-energy electron-impact ionization of nitrogen molecules
  • Theoretical calculation of fully differential cross sections for electron-impact ionization of hydrogen molecules
  • Theoretical treatment of electron-impact ionization of molecules
  • Young-type interference in (E,2E) ionization of H2
  • Experimental and theoretical cross sections for coplanar asymmetric ionization of H₂ by 75.3 eV incident energy electrons


xiii, 197 pages

Note about bibliography

Includes bibliographical references.


© 2006 Junfang Gao, All rights reserved.

Document Type

Dissertation - Citation

File Type




Subject Headings

Electron impact ionization
Molecular dynamics

Thesis Number

T 8989

Print OCLC #


Link to Catalog Record

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