DFN-RYST: Verteilung einer Modell- und Methodenbank mit Datenbasis in einem offenen Netz Pflichtenheft

SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Hg-199 and Cu-65,Cu-65 Nmr-Studies of Mercury Based High-T-C Supercouductors

Hg-oxide ceramic high temperature superconductors were studied by Hg-199 and (CU)-C-63,65 NMR spectroscopy. Room temperature spectra, spin-spin and spin-lattice relaxation times of samples with different superconducting transition temperatures are presented. A spin-lattice relaxation time of T-1 = 35 msec and a spin-spin relaxation time of T-2 = 1.6 msec were found for the Hg-199 NMR. All samples exhibit similar characteristic powder spectra caused by an axially symmetric Hg-199 spin interaction. The isotropic value and the anisotropy of the tenser relative to solid HgCl2 as a standard substance is estimated. Furthermore, results of (CU)-C-63,65 NMR measurements at a temperature of 4.2 K which exhibit a typical powder line shape (for I = 3/2) are presented

Standardizing the resolution claims for coherent microscopy

The definition and reporting of spatial resolution for coherent imaging methods varies widely in the imaging community. We advocate the use of a standard spoke-pattern imaging target and the mandatory inclusion of information about underlying a priori assumptions