The magnetic field has been determined on F in CuO in the ordered phase. For magnetic fluctuations above the ordering temperature lower limits have been obtained for CuO and La2−χSrχCuO4 with x=0.07.
The magnetic field has been determined on F in CuO in the ordered phase. For magnetic fluctuations above the ordering temperature lower limits have been obtained for CuO and La 2−χ Sr χ CuO 4 with x=0.07.
The EPG for Kb in statistically disordered Rb-Cs alloys was measured by Kb PAD. Complementary Kb (and Cs) NMR experiments gave information about the nuclear quadrupole moment and Knight shift inhomogeneities. From the motional narrowing observed in all experiments at high temperature the activation energy of diffusion was determined.
For Fr in Hg an extremely small Knight shift has been found as compared to the shift known for an alkali metal host. It indicates an almost complete loss of the outer s-electron of the alkali atom Fr when embedded in liquid mercury. This may be understood as a consequence of the small ionization energy of the Fr atom in comparison with the large work function of mercury.
The local susceptibility and $3d$-spin dynamics of isolated Fe ions recoil implanted into alkali-metal hosts is measured by the perturbed-$\ensuremath{\gamma}$-ray-distribution method. The observations of extremely large values for the hyperfine fields and magnetic moments and of an extremely small spin linewidth are quantitatively consistent with a stable $3{d}^{6}$ configuration of ${\mathrm{Fe}}^{2+}$ ions in spin-orbit coupling along with a negligible crystal-field splitting. Fe in Li strongly deviates from the magnetic behavior of a purely ionic configuration. The results permit a comparison of local-moment formation of $3d$ with $4f$ systems.
The magnetic moment of the 12+-isomer in192Pb has been measured using the PAD technique. The isomer was populated by156Gd (40Ar,4n)-reaction with a pulsed40Ar-beam of 185 MeV. The result for the g-factor is g=−0.173(2) after corrections for Knight shift and diamagnetism. As this state has a rather pure Ν (i13/2)2− configuration, the value reflects directly the Ν i13/2 orbital. It shows a decrease towards the more neutron deficient isotopes attributed to the reduced core polarisation as a result of decreasing occupation of the i13/2 neutron shell. In comparison with a core polarisation calculation good agreement was found.
The magnetic moment of the 12+-isomer in192Pb has been measured using the PAD technique. The isomer was populated by156Gd (40Ar,4n)-reaction with a pulsed40Ar-beam of 185 MeV. The result for the g-factor is g=−0.173(2) after corrections for Knight shift and diamagnetism. As this state has a rather pure Ν (i13/2)2− configuration, the value reflects directly the Ν i13/2 orbital. It shows a decrease towards the more neutron deficient isotopes attributed to the reduced core polarisation as a result of decreasing occupation of the i13/2 neutron shell. In comparison with a core polarisation calculation good agreement was found.
Electromagnetic levitation under microgravity provides unique opportunities for the investigation of liquid metals, alloys and semiconductors, both above and below their melting temperatures, with minimized disturbances of the sample under investigation. The opportunity to perform such experiments will soon be available on the ISS with the EML payload which is currently being integrated. With its high-performance diagnostics systems EML allows to measure various physical properties such as heat capacity, enthalpy of fusion, viscosity, surface tension, thermal expansion coefficient, and electrical conductivity. In studies of nucleation and solidification phenomena the nucleation kinetics, phase selection, and solidification velocity can be determined. Advanced measurement capabilities currently being studied include the measurement and control of the residual oxygen content of the process atmosphere and a complementary inductive technique to measure thermophysical properties.