Relativistic effects /Multiconfiguration Dirac-Fock method / Kurchatovium /Ground state SummaryRelativistic calculations of the electronic structure of the kurchatovium atom were carried out taking 468//-configurations into account. It was found that the ground state of Ku should be a J =2 level consisting mostly of the 6d7s 2 7p configuration (80%). The nearest level (lying « 0.5 eV higher) is the one with/= 2, in which the 6d 2 7s 2 configuration makes up 95%. The 7s 2 7p 2 configuration lies 2.9 eV above the ground state. It is concluded from the comparison of the orbital energies and multielectron levels of Ku and the atoms of d-and p-elements of group IV that, according to its chemical properties, kurchatovium must belong to d-, rather than to p-elements.

No abstract

No abstract

The system consisting of permanent magnets of Kittel open domain structure with a mask made of thin sheets of soft magnetic material is described. The simulations showed that the maximal value of induction for system consisting of two neodymium–iron–boron magnets in presence of a mask is increased from 3 T (without a mask) up to 4 T. In this case the product B∇B on the distance of 0.01 mm achieves a value of 4.2 × 1011 mT2/m. The experimental device with a mask made of low carbon steel sheets is shown to be useful for separation of paramagnetic substances such as dysprosium sulfate, europium chloride and copper chloride. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

No abstract