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An experiment to search for superdeformation in $^{144}$Gd was performed using the $^{100}$Mo($^{48}$Ti,4n)$^{144}$Gd reaction at 221 MeV. The beam was delivered by the tandem accelerator at the INFN/LNL at Legnaro, $\gamma$-radiation was measured with the GASP array consisting of 40 compton supressed germanium detectors. [...]

In spite of the high temperature strength, the wear resistance, the oxidation and hot corrosion resistance, and the low density, the potential applications for ceramic materials are limited by their brittleness. Intensive efforts in materials research and development are therefore being undertaken with the aim of producing a 'tough' ceramic material. [...]

Tables and graphs are compiled to evaluate mixed spectra from $\beta$ emitters in a liquid scintillation spectrometer. Particular importance is attached to defining quenching behavior via the tSIE value determinable with the device, and thus the associated reduction $\delta$ of the maximum energy of the $\beta$ spectrum (Appendix I). [...]

Based on the meson-exchange framework the present work investigates the role played by meson-meson processes in strong interaction dynamics. We concentrate on two particular topics, one representing the more fundamental aspects of meson-meson systems the other being an example for the many possible applications. [...]

Das Ziel meiner Arbeit war es ein Temperaturüberwachungssystem zu entwickeln und aufzubauen, das möglichst vielen verschiedenen, statisch betriebenen Magneten Schutz bieten kann. Das System benutzt schnelle Strom- und Spannungsmeßstellen mit A/D-Umsetzung deren Eingangsbereiche auf den anzuschließenden Magneten angepaßt werden können. [...]

Die theoretische Beschreibung der elektrischen und optischen Zusammenhänge in PIN-Solarzellen aus amorphem hydrogenisiertem Silizium (a-Si:H) zeigt immer noch Unzulänglichkeiten. Das gilt nicht nur für das generelle Verständnis der Zustandsdichte nach der Alterung, sondern auch für deren Beschreibung in ungealterten Schichten und Schichtsystemen [...]

In this thesis the micromagnetic structure of single crystal iron films was investigated by means of magnetic force microscopy (MFM) and Kerr microscopy. The investigated samples are iron films which were epitaxially grown on a GaAs substrate. [...]

In recent years a number of experimental investigations have been performed concerning the space distribution of carbon ions in the TEXTOR plasma. These measurements were either local (radial distribution of C$^{z+}$-ions at he outboard midplane as measured by Li$^{0}$-beam activated cx-spectroscopy [1]) or integral (spectral measurements of C$^{z+}$-line emission integrated along off-centered lines within an angular range as seen from a spectrometer at an upper position of the TEXTOR-vessel [2]). [...]

In this work the reasons for the deactivation of a Cu/ZnO/Al$_{2}$O$_{3}$ catalyst used in methanol synthesis from carbon dioxide and hydrogen were investigated. Experiments in a differential recycle reactor showed that the water partial pressure dominates the ageing process. [...]