Reports

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 [...]

The crack growth behaviour of materials for application in turbines at temperatures of 500- 750 °C has been investigated. The creep and fatigue service loadings of a real turbine clisc were simulated by introclucing hold-times [...]

At tight aspect ratios tokamak plasmas possess features not present at large aspect ratios, such as natural elongation, triangularity, a natural divertor configuration and a considerable bootstrap effect. However, the pulse duration in ST's (Spherical Tori) seems to be considerably smaller than in conventional takamaks due to the much smaller flux swing of the primary solenoid in ST's [...]

The relation between multidimensional Nuclear Magnetic Resonance (NMR) techniques and the dynamical behaviour of complex molecules is considered in this work. Two important NMR-interactions, the chemical shift and anisotropic contributions in the case of restricted motions of molecules, are introduced and discussed in two well-established models for polymer dynamics. [...]

Halides of lanthanide are essential components of filling of modern metal halide discharge lamps. These filling made in the arc a line-rich emission spectra in visible region. [...]

Solid oxide fuel cells are operated at temperatures from 1073 K to 1273 K due to the use of ceramic materials as solid electrolyte. In view of the high temperatures and the required long operating times of at least 40000 hours particularly great demands are made on the stability and chemical compatibility of the materials used. [...]

When a semiconductor is inserted into an electrolyte, a rectifying electrical contact is produced. This contact is suitable for converting solar into electrical or chemical energy. [...]

The lateral resistance of a thin metal film depends an the presence or absente of other species at the film surface. This phenomenon has been investigated regarding possible analytical applications for the determination of heavy metals in aqueous solutions. [...]

In the present work the high temperature corrosion behaviour of three 9% Cr-steels in simulated coal combustion gases has been investigated. For comparison reason the conventional ferritic steels X 20 CrMoV 12-1 and 10 CrMo 9-10 as well as the austeniticX 3 CrNiMoN 17-13 were also incorporated in the research program [...]

We study several semi-inclusive production mechanisms in deep inelastic scattering and high energy hadronic scattering and their impact one the total virtual photoabsorption cross section (the structure function) as dictated by the unitarity relations for the scattering matrix. We first consider the $\overline{d} - \overline{u}$ asymmetry in the proton sea, driven by the pionic content of the proton [...]