Eine Verallgemeinerung der Permutationsgruppen

Ohne Zusammenfassung     

Darstellungstheorie der Hyperoktaedergruppe

Ohne Zusammenfassung     

Ueber die Hofmann'sche Reaction auf Phosphor

Ohne Zusammenfassung     

Hyperfine interactions and charge distributions of actinide ions recoiling into vacuum

The angular distribution of conversion electrons from the 4⁺→2⁺ transition in the ground-state rotational band of²⁴⁰Pu has been measuredvia the²³⁸U (α,2n)²⁴⁰Pu reaction. The electrons are emitted in flight from the Pu nuclei recoiling into vacuum atv/c?0.2%. The attenuation of the angular distribution by extranuclear fields is found to be less than 20% within 120 ps. The hyperfine interactions are discussed with particular attention to the high charge states of actinide recoil ions following internal conversion. Charge distributions ranging up to 45⁺ have been observed for²⁴⁰Cm nuclei in the²³⁹Pu(α,3n) reaction.     

Influence of the Motion Behavior on the Contact Heat Transfer Between the Covered Wall and Solid Bed in Rotary Kilns

The effect of the transverse motion behavior on contact heat transfer was experimentally investigated in an indirectly heated batch rotary drum. Inside the drum, one rotating and one stationary measuring rod were installed, each assembled with 16 K-type thermocouples to measure temperatures. Thus, the radial and circumferential temperature gradients within the solid bed were measured, and the contact heat transfer was determined. As test materials, quartz sand, alumina, and cement powder were used, and the parameters filling degree (10–20%) and rotational speed (1–6 rpm) were varied.     

Magnetic field orientation dependence of flux pinning in (Gd,Y)Ba2Cu3O7−x coated conductor with tilted lattice and nanostructures

The dependence of the critical current density (J_c) on the orientation of an applied magnetic field was studied for a prototype (Gd,Y)Ba₂Cu₃O_7?x (GdYBCO) coated conductor fabricated by MOCVD on an IBAD-MgO template. Additional rare-earth cations (Y and Gd) and Zr were incorporated into the superconducting film to form (Y,Gd)₂O₃ and BaZrO₃ nanoparticles extended nearly parallel to the a–b planes and to the c-axis, respectively, to enhance the flux pinning. In-field measurement of J_c was carried out with electrical current flowing either along or perpendicular to the longitudinal axis of the tape, while a maximum Lorentz force configuration was always maintained. Details in the angular dependence of J_c were related to the unique structure of the film, specifically the tilt in the GdYBCO lattice and the tilts in the extended (Y,Gd)₂O₃ and BaZrO3 nanoparticles. XRD and TEM were used to study the structure of the coated conductor. The effect of the misalignment between the external field H and the internal field B on the angular dependence of J_c is discussed.