Asymmetric Double Quantum Wells with Smoothed Interfaces

We have derived and analyzed the wavefunctions and energy states for an asymmetric double quantum wells, broadened due to static interface disorder effects, within well known discreet variable representation approach for solving the one-dimensional Schrodinger equation. The main advantage of this approach is that it yields the energy eigenvalues and the eigenvectors in semiconductor nanostructures of different shapes as well as the strengths of the optical transitions between them. We have found that interface broadening effects change and shift energy levels to higher energies, but the resonant conditions near an energy coupling regions do not strongly distorted. A quantum-mechanical calculations based on the convolution method (smoothing procedure) of the influence of disorder on the motion of free particles in nanostructures is presented.Comment: 10 pages, 4 figure

Measurement of charged particle spectra in deep-inelastic ep scattering at HERA

Charged particle production in deep-inelastic ep scattering is measured with the H1 detector at HERA. The kinematic range of the analysis covers low photon virtualities, 5 LT Q(2) LT 100 GeV2, and small values of Bjorken-x, 10(-4) LT x LT 10(-2). The analysis is performed in the hadronic centre-of-mass system. The charged particle densities are measured as a function of pseudorapidity (n(*)) and transverse momentum (p(T)(*)) in the range 0 LT n(*) LT 5 and 0 LT p(T)(*) LT 10 GeV in bins of x and Q(2). The data are compared to predictions from different Monte Carlo generators implementing various options for hadronisation and parton evolutions

Space Congress Luncheon

Space Congress Luncheon Speaker: Valentin Lebedev, U.S.S.R

Unpublished and rare coins of the Golden Horde from the site of Nizhny Dzhulat (North Caucasus)

The ancient settlement of Nizhny Dzhulat is located on the right bank of the Terek River near the town of Maysky in Kabardino-Balkaria. A large amount of the Golden Horde coins was found there by locals during agricultural work. The authors obtained electronic images of coins found in 2010-2012. In this paper they summarize the results of the study of copper coins from the Nizhny Dzhulat complex. Based on the dated coins, the chronology of copper coins covers 100-year period from 1420s to 1520s. In the complex there are many rare and unpublished types and variants for coins, 16 of which are described in the article. Copper coinage of Djanibek II presents two new types and ten new variants. There were considered seven types of Haji-Tarkhan coins, including the unreleased dated type of "Animals at the trough" of 805 AH. Horde minted al- Jadid's coins are presented here with two types of animalistic symbolism and with a review of the unreleased coin with tamga "glasses" of Emir Ibrahim al-Jadid's coinage of 777 AH

Incorporation of clusters of titanium oxide in Beta zeolite structure by a new cold TiCl4-plasma process: physicochemical properties and photocatalytic activity

International audienceA new post-synthetic approach, involving cold plasma treatment, was employed for the preparation of TiO2–Beta zeolite. Zeolite Beta nanoparticles were first subjected to plasma induced deposition of TiCly (with y ≤ 3), which were further converted into TiOx (with x ≤ 2) upon O2-plasma treatment. Different steps of the new elaborated plasma approach were monitored using in situ FTIR spectroscopy. D2O isotopic exchange was used in order to shed light on the formation of Si–O–Ti bonds induced by TiCl4-plasma followed by O2-plasma treatments. The obtained TiO2–Beta materials were studied by a set of complementary characterization techniques including FTIR, TEM, SEM-EDS, XRD, N2 sorption, NMR and UV-Vis. The silanol content and the acidic properties of TiO2–Beta composites were also studied. The elaborated materials were tested as photocatalysts for methanol photooxidation in the gas phase. TiO2–Beta presents a methanol photooxidation rate 8 times higher than a conventional P25-TiO2 catalyst under UV irradiation