{"id":{"repo_id":"bielefeld","oai_identifier":"oai:pub.uni-bielefeld.de:2303618"},"canonical_url":"https://search.dev.ndltd.org/etd/bielefeld/oai:pub.uni-bielefeld.de:2303618","repository":{"repo_id":"bielefeld","name":"Universität Bielefeld","base_url":"https://pub.uni-bielefeld.de/oai"},"display":{"title":"Spinabhängige Asymmetriefunktionen in der elastischen und inelastischen Elektron-Cäsium-Streuung bei mittleren Energien","abstract":"The determination of spin-polarization effects in elastic and inelastic (6P) electron scattering from Cs atoms has provided a challenge, experimentally as well as theoretically, for many years. In a crossed-beam arrangement a polarized electron beam from a strained GaAs crystal is intersected with a polarized Cs atomic beam to measure the angular dependences of the spin-asymmetries A1, A2 and Ann as well as the relative differential cross section at selected energies in the range from 4 to 25 eV. The asymmetries can be related to electron exchange processes (Ann), to relativistic/spin-orbit effects (A2), or to an interference of these two mechanisms (A1). A comparison can be made in this theoretically difficult intermediate energy regime with recent calculations, which use either the relativistic R matrix method, or the convergent close-coupling method.","abstract_html":"The determination of spin-polarization effects in elastic and inelastic (6P) electron scattering from Cs atoms has provided a challenge, experimentally as well as theoretically, for many years. In a crossed-beam arrangement a polarized electron beam from a strained GaAs crystal is intersected with a polarized Cs atomic beam to measure the angular dependences of the spin-asymmetries A1, A2 and Ann as well as the relative differential cross section at selected energies in the range from 4 to 25 eV. The asymmetries can be related to electron exchange processes (Ann), to relativistic/spin-orbit effects (A2), or to an interference of these two mechanisms (A1). A comparison can be made in this theoretically difficult intermediate energy regime with recent calculations, which use either the relativistic R matrix method, or the convergent close-coupling method.","abstract_has_math":false,"creators":["Roth, Bernhard"],"institution":"Universität Bielefeld","degree_name":null,"degree_level":"thesis.doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2001,"date_issued":"2001-05-22","date_published":"2001-05-22","updated_at":"2026-07-27T18:49:55Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://pub.uni-bielefeld.de/record/2303618","outbound_label":"Repository record","outbound_source":"source_url"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Roth, Bernhard"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:publisher","label":"Institution","values":["Universitätsbibliothek Bielefeld"]},{"key":"dc:type","label":"Dc Type","values":["doctoralThesis"]},{"key":"thesis:degree_level","label":"Degree Level","values":["thesis.doctoral"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Universität Bielefeld"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The determination of spin-polarization effects in elastic and inelastic (6P) electron scattering from Cs atoms has provided a challenge, experimentally as well as theoretically, for many years. In a crossed-beam arrangement a polarized electron beam from a strained GaAs crystal is intersected with a polarized Cs atomic beam to measure the angular dependences of the spin-asymmetries A1, A2 and Ann as well as the relative differential cross section at selected energies in the range from 4 to 25 eV. The asymmetries can be related to electron exchange processes (Ann), to relativistic/spin-orbit effects (A2), or to an interference of these two mechanisms (A1). A comparison can be made in this theoretically difficult intermediate energy regime with recent calculations, which use either the relativistic R matrix method, or the convergent close-coupling method."]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["application/ps"]},{"key":"dc:title","label":"Title","values":["Spinabhängige Asymmetriefunktionen in der elastischen und inelastischen Elektron-Cäsium-Streuung bei mittleren Energien"]}]}],"canonical_facts":{"dc:creator":["Roth, Bernhard"],"dc:description.abstract":["The determination of spin-polarization effects in elastic and inelastic (6P) electron scattering from Cs atoms has provided a challenge, experimentally as well as theoretically, for many years. In a crossed-beam arrangement a polarized electron beam from a strained GaAs crystal is intersected with a polarized Cs atomic beam to measure the angular dependences of the spin-asymmetries A1, A2 and Ann as well as the relative differential cross section at selected energies in the range from 4 to 25 eV. The asymmetries can be related to electron exchange processes (Ann), to relativistic/spin-orbit effects (A2), or to an interference of these two mechanisms (A1). A comparison can be made in this theoretically difficult intermediate energy regime with recent calculations, which use either the relativistic R matrix method, or the convergent close-coupling method."],"dc:format.medium":["application/ps"],"dc:publisher":["Universitätsbibliothek Bielefeld"],"dc:title":["Spinabhängige Asymmetriefunktionen in der elastischen und inelastischen Elektron-Cäsium-Streuung bei mittleren Energien"],"dc:type":["doctoralThesis"],"thesis:degree_level":["thesis.doctoral"],"thesis:institution_name":["Universität Bielefeld"]},"updated_at":"2026-07-27T18:49:55Z"}