Print Email Facebook Twitter The Delft intense slow positron beam 2D-ACAR facility for analysis of nanocavities and quantum dots Title The Delft intense slow positron beam 2D-ACAR facility for analysis of nanocavities and quantum dots Author Falub, C.V. Contributor Van Veen, A. (promotor) Faculty Interfaculty Reactor Institute Date 2002-10-07 Abstract Positron annihilation spectroscopy is a powerful method to study materials containing very small concentrations of atomic defects and embedded quantum dots. Depending on the method of producing positrons, there are bulk spectroscopies using fast positrons and depth profiling spectroscopies using slow positrons. Both types of spectroscopies are available at the Positron Centre Delft of the Interfaculty Reactor Institute and are applied in material science. This thesis describes the construction of and the first results obtained with a unique two-dimensional angular correlation of annihilation radiation (2D-ACAR) setup coupled to the continuous high intensity slow positron beam (POSH). This new setup allows for the first time high-resolution momentum distribution measurements of thin films, multilayers, interfaces and metallic quantum dots. Important new information con- cerning the geometric and electronic structure of these systems can be obtained with this setup. At this moment the facility is the only one of this kind in the world. Subject positron annihilationintense slow positron beam2D-ACARnanocavitiesnanoclustersquantum dots To reference this document use: http://resolver.tudelft.nl/uuid:2a2eda80-1fb7-47f2-9a75-41458e317caa Publisher Delft University Press ISBN 90-407-2337-0 Part of collection Institutional Repository Document type doctoral thesis Rights (c) 2002 C.V. Falub Files PDF iri_falub_20021007.pdf 12.29 MB Close viewer /islandora/object/uuid:2a2eda80-1fb7-47f2-9a75-41458e317caa/datastream/OBJ/view