Books

The work describes the production technology of standard medical radionuclides using reactors and cyclotrons for patient diagnosis and therapy. A special focus lies on the science and technology involved in the development of novel radionuclides for positron emission tomography (PET) and internal targeted radiotherapy. [...]

A few short words on progress. I believe that the truth of scientific progress and understanding lies in simplification in its various forms – in the sense of distillation and reduction to leave only that which is essential. [...]

Cement-based materials are widely used in nuclear waste management, for example for the solidification of low and intermediate level wastes, as barrier materials in nuclear waste repositories, or in certain waste containers. However, the barrier function of the applied cementitious materials with respect to the migration of safety relevant radionuclides is not completely understood. [...]

The polymer electrolyte membrane (PEM) fuel cell is conventionally constructed of a plurality of thin layer components that are pressed against each other by end plates and clamping elements in order to ensure electrical contact amongst the layers and tightness of the cell’s construction. If the contact pressure is increased, the contact resistances of the layers decrease, and in turn the ohmic resistance of the cell decreases [...]

This thesis provides a theoretical description of magnetic nanostructures in inversionasymmetric environments with strong spin-orbit interaction (SOI). The theoretical concepts introduced here can be applied in the field of spin-orbitronics, which consists ofexploiting the SOI to manipulate the electron spin without external magnetic fields. [...]

In electronics, the application of novel spintronic three-terminal memory devices is proposed to facilitate further improvements of the performance of electronic components. A promising write-mechanism in a spintronic memory is based on the purely electricalswitching of the magnetization by spin-orbit torque (SOT) that can occur, for example, at the interface of heavy metal (HM)/ferromagnetic metal (FM) bilayers.....

The polybenzimidazole-based high-temperature polymer electrolyte fuel (HT-PEFC) has become a major topic in the clean energy field in recent years due to the appealing advantages, e.g., improved electrochemical kinetics and enhanced tolerance to carbon monoxide. However, the introduction of phosphoric acid (PA) in the membrane electrode assembly (MEA) leads to several issues, e.g., phosphate contaminations, accelerated Pt corrosion, and PA leaching [...]

In this work, the mass transport in layer systems of an electrolyzer is investigated. Direct and indirect examination methods were used [...]

A key question in times of climate change is, how the biosphere responds to global change and the local land use management in regard to its carbon cycle. At the present time, the land surface acts as a sink for anthropogenic carbon dioxide (CO2) emissions. [...]

The electronic and geometrical structures, in particular the electric field gradients (EFGs), of [CdD]$^{-}$ (D=P, As, Sb) acceptor-donor pairs in Si and Ge are studied using the full potential Korringa-Kohn-Rostoker (KKR) Green's function method. Since the EFG depends very sensitively an lattice relaxations, the method is extended to treat large displacements with higher accuracy and less computing time [...]