In this thesis I investigate (e, 2e) processes, or electron impact ionization, using several theoretical methods. I first examine the problem using the Born approximations, particularly the Distorted Wave Born Approximation (DWBA), focusing on the underlying processes that dominate for ionization of the 2p state of Argon and Magnesium. I investigate as well the ionization of helium and hydrogen and use the simplicity of the approximation to probe the incident particle effects on the Helium cross section. In both cases the results are compared with experiment. I also produce cross section results for ions near threshold, a regime that is currently under experimental investigation. In the second part of this thesis, I develop an ab initio method for doing these calculations called the X2e method. This is described in full, including derivation of the important features of the method. Preliminary results are presented in comparison with established theory.
","abstract_html":"<p>In this thesis I investigate (e, 2e) processes, or electron impact ionization, using several theoretical methods. I first examine the problem using the Born approximations, particularly the Distorted Wave Born Approximation (DWBA), focusing on the underlying processes that dominate for ionization of the 2<em>p</em> state of Argon and Magnesium. I investigate as well the ionization of helium and hydrogen and use the simplicity of the approximation to probe the incident particle effects on the Helium cross section. In both cases the results are compared with experiment. I also produce cross section results for ions near threshold, a regime that is currently under experimental investigation. In the second part of this thesis, I develop an <em>ab initio</em> method for doing these calculations called the X2e method. This is described in full, including derivation of the important features of the method. Preliminary results are presented in comparison with established theory.</p>","abstract_has_math":false,"creators":["Martinez, Jason Manuel"],"institution":null,"degree_name":"Doctor of Philosophy (PhD)","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Colm T. Whelan","John A. Adam","Alexander L. Godunov","Mark D. Havey","J. Wallace Van Orden"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2008,"date_issued":"2008-07-01T07:00:00Z","date_published":"2008-07-01T07:00:00Z","updated_at":"2026-07-24T03:34:18Z","subjects":["Electron impact ionization","Electron scattering","Ionization","Atomic, Molecular and Optical Physics"],"languages":[],"rights":["In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
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"]},{"key":"dc:title","label":"Title","values":["Investigation of (E, 2E) Collisions and Related Phenomena"]}]}],"canonical_facts":{"dc:contributor":["Colm T. Whelan","John A. Adam","Alexander L. Godunov","Mark D. Havey","J. Wallace Van Orden"],"dc:creator":["Martinez, Jason Manuel"],"dc:date.available":["2019-02-21T08:00:00Z"],"dc:description.abstract":["In this thesis I investigate (e, 2e) processes, or electron impact ionization, using several theoretical methods. I first examine the problem using the Born approximations, particularly the Distorted Wave Born Approximation (DWBA), focusing on the underlying processes that dominate for ionization of the 2p state of Argon and Magnesium. I investigate as well the ionization of helium and hydrogen and use the simplicity of the approximation to probe the incident particle effects on the Helium cross section. In both cases the results are compared with experiment. I also produce cross section results for ions near threshold, a regime that is currently under experimental investigation. In the second part of this thesis, I develop an ab initio method for doing these calculations called the X2e method. This is described in full, including derivation of the important features of the method. Preliminary results are presented in comparison with established theory.
"],"dc:identifier":["9780549739074","https://digitalcommons.odu.edu/physics_etds/51"],"dc:rights":["In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
"],"dc:subject":["Electron impact ionization","Electron scattering","Ionization","Atomic, Molecular and Optical Physics"],"dc:title":["Investigation of (E, 2E) Collisions and Related Phenomena"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Doctor of Philosophy (PhD)"]},"updated_at":"2026-07-24T03:34:18Z"}