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Exchange Effects in Low Energy Electron Impact Ionization of the Inner and Outer Sheels of Argon

Biava, D A; Saha, H P; Engel, E; Dreizler, R.M.; McEachran, Robert; Haynes, M.A.; Lohmann, Birgit; Whelan, C T; Madison, Don Harvey

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First order distorted wave Born approximation (DWBA) triple differential cross sections are reported for low-energy electron-impact ionization of the inner 3s and outer 3p shells of argon. Previous DWBA works have demonstrated that experiment and theory are not in accord for low energy ionization of inert gases and here we investigate the importance of exchange scattering. Different approximations for treating exchange scattering are investigated. It is shown that exchange scattering is...[Show more]

dc.contributor.authorBiava, D A
dc.contributor.authorSaha, H P
dc.contributor.authorEngel, E
dc.contributor.authorDreizler, R.M.
dc.contributor.authorMcEachran, Robert
dc.contributor.authorHaynes, M.A.
dc.contributor.authorLohmann, Birgit
dc.contributor.authorWhelan, C T
dc.contributor.authorMadison, Don Harvey
dc.date.accessioned2015-12-13T23:17:19Z
dc.date.available2015-12-13T23:17:19Z
dc.identifier.issn0953-4075
dc.identifier.urihttp://hdl.handle.net/1885/89667
dc.description.abstractFirst order distorted wave Born approximation (DWBA) triple differential cross sections are reported for low-energy electron-impact ionization of the inner 3s and outer 3p shells of argon. Previous DWBA works have demonstrated that experiment and theory are not in accord for low energy ionization of inert gases and here we investigate the importance of exchange scattering. Different approximations for treating exchange scattering are investigated. It is shown that exchange scattering is particularly important for 3s ionization. Even with a proper treatment of exchange, the first order calculations are still not in satisfactory agreement with experiment. Consequently higher order effects will have to be included to achieve a satisfactory description of the low-energy ionization process. We also investigated both the Hartree-Fock and optimized potential methods for calculating atomic wavefunctions and static potentials and found that both methods produced almost the same cross sections.
dc.publisherInstitute of Physics Publishing
dc.sourceJournal of Physics B: Atomic, Molecular and Optical Physics
dc.subjectKeywords: Approximation theory; Argon; Calculations; Electron energy levels; Electron scattering; Impact ionization; Optimization; Atomic wavefunctions; Distorted wave Born approximation; Hartree-Fock method; Low energy electron impact ionization; Optimized potenti
dc.titleExchange Effects in Low Energy Electron Impact Ionization of the Inner and Outer Sheels of Argon
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume35
dc.date.issued2002
local.identifier.absfor020201 - Atomic and Molecular Physics
local.identifier.ariespublicationMigratedxPub19765
local.type.statusPublished Version
local.contributor.affiliationBiava, D A, University of Missouri
local.contributor.affiliationSaha, H P, University of Central Florida
local.contributor.affiliationEngel, E, University of Frankfurt
local.contributor.affiliationDreizler, R.M., University of Frankfurt
local.contributor.affiliationMcEachran, Robert, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationHaynes, M.A., Griffith University
local.contributor.affiliationLohmann, Birgit, Griffith University
local.contributor.affiliationWhelan, C T, Old Dominion University
local.contributor.affiliationMadison, Don Harvey, University of Missouri
local.bibliographicCitation.issue2
local.bibliographicCitation.startpage293
local.bibliographicCitation.lastpage307
local.identifier.doi10.1088/0953-4075/35/2/308
dc.date.updated2015-12-12T08:52:28Z
local.identifier.scopusID2-s2.0-0037185685
CollectionsANU Research Publications

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