Application of a fusion model using collective variables and microscopically related mass parameters

A calculation of nucleus-nucleus collisions is presented, using a model which starts from a TDHF equation and leads to classical equations of motion for a set of four collective variables. Restricting to axial symmetry and assuming the liquid drop mass formula to hold, a differential equation is derived, which describes nuclear deformations and energies and is used to construct a potential energy surface for the collective variables. The nuclear deformations are obtained without the need of shape parameters. The equations of motion for the collective variables are solved numerically.     

The He(Iα) Photoelectron Spectra of Substituted 1,2-Dithietes

The He(Iα) photoelectron (PE.) spectra of a series of substituted 1,2-dithietes have been recorded and assigned with respect to the orbital sequence derived from an STO-3G model calculation and by correlation with the PE. spectra of related compounds. The results provide additional support for the presence of a closed, four-membered ring moiety in all the 1,2-dithietes investigated. In all cases the two highest occupied molecular orbitals are b₂(π)= HOMO, a₂(π), with exception of 3,4-bis(trifluoromethyl)-1,2-dithiete where the sequence b₂(π), a₂(π) or a₂(π), b₂(π) is uncertain.     

Darstellung und Kristallstruktur von SrCu2Sb2 und SrZnBi2

Preparation and Crystal Structure of SrCu₂Sb₂ and SrZnBi₂ SrCu₂Sb₂ and SrZnBi₂ have been prepared and analytically and structurally characterized. SrCu₂Sb₂ crystallizes tetragonal in the CaBe₂Ge₂ structure type. SrZnBi₂ has its own structure type. In both structures the transition metal atoms form with the semimetal atoms tetragonal pyramids, which are connected by common edges of the basis to twodimensional sheets. These sheets are separated in the case of SrCu₂Sb₂ by single sheets of strontium atoms, in the case of SrZnBi₂ by double sheets of strontium atoms in which fourfold nets of Bi atoms are located.     

Ein Radioimmunoassay zur simultanen Bestimmung von T3 und T4 im Blutserum mit Hilfe kleiner Ionenaustauschers?ulen

Zusammenfassung Eine radioimmunologische Methode zur simultanen Bestimmung der beiden Schilddrüsenhormone T₃ und T₄ im Blutserum wird beschrieben. Die Abtrennung der Hormone von den Serumproteinen, die Reaktion mit dem Antiserum und die bound-free-Trennung erfolgen auf kleinen lonenaustauschersäulen. Als Säulenfüllung dient ein Mischbettaustauscher, bestehend aus QAE- und SP-Sephadex. Die Analysenergebnisse sind mit der G-25 Säulenmethode vergleichbar. Der Materialaufwand bei Einmalsäulen kann durch die Verwendung des beschriebenen Ionenaustauschers stark gesenkt werden.Herrn a.o. Univ.-Prof. Dipl.-Ing. Dr. techn. Wladimir Limontschew zum 60. Geburtstag