Proton mobility in complex [RhL4Cl2]HSO4 · nH2SO4 · mH2O salts (L = Py, γ-picoline)

The method of deposition from solutions was used to synthesize [RhL ₄Cl₂]HSO₄ · nH₂SO₄ · mH₂O complex salts (L = Py, γ-picoline), n ≈ 0.5−0.6, m ≈ 5−6. According to the data of X-ray phase analysis, the crystal structure of these salts is formed by layers of cations separated by layers consisting of anions molecules of sulfuric acid and water connected through a system of hydrogen bonds. Calorimetric methods were used to study phase transitions and the range of thermal stability of salts. The method of ¹H NMR spectroscopy discovered that protons within the {HSO₄⁻ · nH₂SO₄ · mH₂O} subsystem featured enhanced conductivity. Conductivity studies showed that trans-[RhL ₄Cl₂]HSO₄ · nH₂SO₄ · mH₂O samples had high proton conductivity.     

Scalar products of dirichlet series and the distribution of integer points on toric varieties

The scalar product of Hecke series with Größencharakteren, introduced by Yu. V. Linnik, and its generalizations are studied. Analytic properties of the functions under consideration are closely related to the distribution of integer points on toric varieties. Bibliography: 22 titles.     

Isotope shift and hyperfine structure measurements for 155Yb by laser ion source technique

The change in the mean square charge radius and electromagnetic moments of the neutron deficient ¹⁵⁵Yb isotope have been determined using resonance ionization spectroscopy in a laser ion source. The data point to an absence of a marked deformation change for Yb isotopes with N=84−86. Received: 2 October 1997 / Revised version: 24 October 1997     

Co/Pd and Co/Pd/CoNi multilayer films: Determination of the sign and magnitude of the exchange interaction of ferromagnetic layers separated by palladium layers

It is found that the exchange interaction of Co (5 nm)ferromagnetic layers via Pd in Co/Pd multilayer films and of Co (5 nm)and CoNi (5 nm) layers via the same nonmagnetic metal in Co/Pd/CoNi films can be both ferro-and antiferromagnetic. The period of the AF-F-AF oscillations is of the order of 0.8 nm, and the amplitude of the oscillations decays as a power-law function ~d _Pd ⁻² . Pis’ma Zh. éksp. Teor. Fiz. 66, No. 7, 487–491 (10 October 1997)     

Efficiency of Si L 2,3 x-ray generation in the SiO2/Si system by electron impact

The paper reports a study of the depth profile of the generation efficiency and escape of the ultrasoft silicon L _2,3 x-ray radiation excited by electrons of various energies. The generation function describing the excitation efficiency is the kernel of an integral equation determining the dependence of x-ray emission intensity on primary-electron energy. To determine the form of this function, a study was made of the dependence of the Si L _2,3 x-ray spectral intensity and of its silicon L _2,3 component bands, from crystalline silicon and amorphous dioxide SiO₂, on primary-electron energy in samples made from dioxide layers of various thicknesses grown on crystalline silicon. These experiments permitted investigation of the generation-function cross sections at the depth of the Si-SiO₂ interface. The theoretical simulation of the generation function made use of the simplest laws governing electron interaction with solids and of the cross section of the inner-level ionization by electron impact in its most general form. A comparison of the experimentally obtained relative contributions of the Si and SiO₂ emissions with the calculations shows them to be in good agreement up to primary-electron energies of 2–3 keV. Fiz. Tverd. Tela (St. Petersburg) 40, 1932–1936 (October 1998)     

A process for production of granulated soluble glass in ore-thermal furnaces

A process for production of soluble sodium glass in electric-arc ore-thermal furnaces with three graphite electrodes was suggested and tested on the industrial scale. Fusion of sand with sodium carbonate, followed by rapid cooling of the fusion cake with cold water, yields finely grained sodium metasilicate with a developed network of microcracks as a result of a thermal impact in the course of aqueous granulation of the fusion cake.