Der Interferenzeffekt in der magnetischen Kernrelaxation für Vierspin-Systeme. V

The interference of intramolecular dipole-dipole interaction and anisotropy of electronic screening in nuclear magnetic relaxation is taken into account for systems containing four identical nuclei of spin 1/2 located at the corners of a tetrahedral, a square and a rectangle. The influence of spinrotational interaction is also considered. The results, presented in the paper show that, due to the interference effect, a significant deviation of a pure exponential time dependence of nuclear magnetization in some special cases may appear.     

Chemie-Nobelpreis für Ozonforscher

Der diesjähriege Nobelpreis für Chemie geht an Paul Crutzen vom Max-Planck-Institut für Chemie in Mainz, Mario Molina (Massachusetts Institute of Technology) und R. Sherwood Rowland (University of California, Irvine, USA). Das Komitee würdigte damit ihre ?Arbeiten zur Chemie der Atomsphäre, insbesondere über Bildung und Abbau von Ozon”?.