{"id":{"repo_id":"must-thes","oai_identifier":"oai:scholarsmine.mst.edu:doctoral_dissertations-2668"},"canonical_url":"https://search.dev.ndltd.org/etd/must-thes/oai:scholarsmine.mst.edu:doctoral_dissertations-2668","repository":{"repo_id":"must-thes","name":"Missouri University of Science and Technology","base_url":"https://scholarsmine.mst.edu/do/oai/"},"display":{"title":"Electron-impact ionization of molecules","abstract":"\"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.","abstract_html":""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.","abstract_has_math":false,"creators":["Gao, Junfang"],"institution":"University of Missouri--Rolla","degree_name":"Ph. D. in Physics","degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2016,"date_issued":"2016-02-10T08:00:00Z","date_published":"2016-02-10T08:00:00Z","updated_at":"2026-07-24T03:20:02Z","subjects":["Distorted wave impulse approximation","Physics"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://scholarsmine.mst.edu/doctoral_dissertations/1666","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Gao, Junfang"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["2016-02-10T08:00:00Z"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation - Citation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph. D. in Physics"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Missouri--Rolla"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Distorted wave impulse approximation","Physics"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholarsmine.mst.edu/doctoral_dissertations/1666"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["\"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."]},{"key":"dc:title","label":"Title","values":["Electron-impact ionization of molecules"]}]}],"canonical_facts":{"dc:creator":["Gao, Junfang"],"dc:date.available":["2016-02-10T08:00:00Z"],"dc:description.abstract":["\"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."],"dc:identifier":["https://scholarsmine.mst.edu/doctoral_dissertations/1666"],"dc:subject":["Distorted wave impulse approximation","Physics"],"dc:title":["Electron-impact ionization of molecules"],"dc:type":["Dissertation - Citation"],"thesis:degree_name":["Ph. D. in Physics"],"thesis:institution_name":["University of Missouri--Rolla"]},"updated_at":"2026-07-24T03:20:02Z"}