Doctoral Dissertations


Second order distorted wave calculations for electron impact ionization processes


Zhangjin Chen

Keywords and Phrases

Simultaneous excitation; Second-order


"Electron impact ionization of atoms provides a fundamental test of the current understanding of atomic structure as well as our understanding of the three body problem. Triple differential cross sections (TDCS), measured in the coincidence experiment, provide the most sensitive test of the theory of electron impact ionization processes. It was found two decades ago that second-order effects were crucial in explaining both the positions and magnitudes of the binary and recoil peaks in the TDCS. However, the existing theoretical calculations of second-order amplitudes typically resort to simplifying approximations, such as the closure approximation or neglecting the real part of the Green's function, to make the calculation tractable. In this work, we have developed a second-order distorted wave (DWB2) theory for atomic ionization which does not make these approximations"--Abstract, page iv.



Degree Name

Ph. D. in Physics


University of Missouri--Rolla

Publication Date

Fall 2005

Journal article titles appearing in thesis/dissertation

  • Second order distorted wave calculations for electron impact ionization of hydrogen
  • Second-order distorted wave calculations for electron impact ionization of helium to He⁺ (B=1 and 2)
  • Experimental and theoretical momentum transfer dependence of the He (e, 2e) cross section
  • Electron impact ionization of helium at 102 eV in coplanar and perpendicular geometries


x, 109 pages

Note about bibliography

Includes bibliographical references.


© 2005 Zhangjin Chen, All rights reserved.

Document Type

Dissertation - Citation

File Type




Subject Headings

Electron impact ionization
Ionization of gases

Thesis Number

T 8839

Print OCLC #


Link to Catalog Record

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