E-Dissertationen: Search
Now showing items 31-40 of 435
Optische Spektroskopie von PTCDA auf Alkalihalogenidoberflächen: vereinzelte Moleküle und Monolagen
(2012-08-03)
In dieser Dissertation wurden die strukturellen und optischen Eigenschaften organischer p-konjugierter Moleküle, die auf einer einkristallinen Oberfläche adsorbiert waren, untersucht. Die Untersuchungen sind damit relevant ...
Trapping fermionic potassium atoms in a quasi-electrostatic optical dipole potential
(2012-08-03)
Ultracold quantum gases have become a frequently used tool for the investigation of a variety of physical issues within the last decade, ranging from general questions in quantum physics up to special topics, e.g. quantum ...
Measurement of polarization observables in the reaction γp →pπ0π0 using linearly polarized photons with the CBELSA/TAPS experiment
(2012-08-10)
The spectrum and the properties of baryon resonances can be studied using photons with energies appropriate to excite baryonic states. Double meson photoproduction allows access to cascading resonance decays via other ......
Bestimmung der Doppelpolarisationsobservablen G in π0-Photoproduktion
(2012-07-18)
Die Hadronenspektroskopie stellt zur Untersuchung des inneren Aufbaus der Nukleonen und damit der Wechselwirkung zwischen den Konstituenten, den Quarks, ein geeignetes Mittel dar. Die bereits gemessenen Anregungszustände ...
Precision calculations for the low-energy dynamics of pions and nucleons
(2012-07-18)
QCD is strongly coupled at long distances and therefore non-perturbative methods are required to understand its low-energy properties, e.g. to answer such basic questions as of the origin of the nucleon mass. In this thesis ...
Inferring complex networks from time series of dynamical systems: Pitfalls, misinterpretations, and possible solutions
(2012-07-26)
Understanding the dynamics of spatially extended systems represents a challenge in diverse scientific disciplines, ranging from physics and mathematics to the earth and climate sciences or the neurosciences. This challenge ...
Emergent Disorder: Nano-Domain Formation Near the First-Order Mott-Hubbard Transition
(2012-07-23)
Since the Mott-Hubbard metal-insulator transition is a first order phase transition, we can always find a phase coexistence region in the phase diagram. In this region, the metallic state and the insulating state coexists, ......
Experimental and numerical studies on solute transport in unsaturated heterogeneous porous media under evaporation conditions
(2012-08-31)
Groundwater level rise, root water uptake, or evaporation induces local upward water and solute fluxes in soils, causing soil salinization and rise of contaminants to the soil surface, and influencing the migration of ...
Small-scale studies of the Milky Way disc and halo gas with absorption-line spectroscopy
(2012-12-13)
Progressive studies in the last decades have shown that the interstellar medium (ISM) is more complex and dynamic than previously thought. The presence of the small-scale structures, structures on scales below 1 pc, has ...
Bestimmung von Intensität und Position des extrahierten Elektronenstrahls an ELSA mittels Hochfrequenzresonatoren
(2012-05-09)
Am Physikalischen Institut der Universität Bonn werden Experimente zur Untersuchung der Nukleonenstruktur betrieben. Aus dem Speicherring der Beschleunigeranlage ELSA wird zu diesem Zweck ein Elektronenstrahl von einigen ...