Güncel Gönderiler: Fizik Bölümü
Toplam kayıt 1178, listelenen: 341-360
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Electrical and optical properties of fluorine-doped CdO films deposited by ultrasonic spray pyrolysis
(Elsevier Science BV, 2007)The CdO:F samples have been deposited onto microscope glass substrates at 250 degrees C by ultrasonic spray pyrolysis method. With the incorporation of fluorine into CdO, the direct optical transition has shifted towards ... -
Optical properties of CdxZn((1-x))O films deposited by ultrasonic spray pyrolysis method
(Elsevier Science Sa, 2007)CdxZn(1-x)O (x=0, 0.59, 0.78 and 1) films have been produced by ultrasonic spray pyrolysis technique using aqueous solutions of CdCl2 H2O and ZnCl2 on the microscope glass substrate between 325 and 400 degrees C. The ... -
Some structural properties of CdO : F films produced by ultrasonic spray pyrolysis method
(Elsevier Science Sa, 2007)The fluorine doped cadmium oxide (CdO:F) samples have been deposited at 250 degrees C by ultrasonic spray pyrolysis method. Cadmiumacetatdihydrat and ammonium fluoride have been taken as a source of cadmium and fluorine-dopant ... -
Electrical properties of ZnO/Au/ZnS/Au films deposited by ultrasonic spray pyrolysis
(Elsevier Science Sa, 2007)Polycrystalline ZnS semiconducting films have been prepared by ultrasonic spray pyrolysis technique in the form of planar and sandwich configurations using amorphous and ZnO coated glass substrates. Deposition of ZnS films ... -
Scattering from a PT symmetric standing wave
(Elsevier, 2012)We study the Kapitza-Dirac diffraction of a free beam particle in the presence of a PT symmetric standing wave. We discuss that the momentum and total probability are not conserved in the non-Hermitian scattering process. ... -
Fast frictionless expansion of an optical lattice
(Elsevier Science BV, 2012)We investigate fast frictionless expansion of an optical lattice with dynamically variable spacing (accordion lattice). We design an expansion trajectory that yields a final state identical to the initial state up to an ... -
Bright soliton in an expulsive potential in a dipolar condensate
(Elsevier Science BV, 2011)We study the stability of matter-wave bright solitons for a dipolar Bose-Einstein condensate in a harmonic potential which is transversely attractive and longitudinally expulsive. We map the regimes of stability as a ... -
Absorption and emission processes in noncommutative space
(World Scientific Publ Co Pte LTD, 2006)Atom-field interaction and absorption, emission of photons in noncommutative space are investigated. We calculate the rate and the directional distribution of the radiation. The modified selection rules which govern allowed ... -
Feshbach resonance and growth of a Bose-Einstein condensate
(American Physical Soc, 2006)The Gross-Pitaevskii gain equation is used to model atom laser and Bose-Einstein condensation (BEC) fed by the surrounding thermal cloud. It is shown that the number of atoms continuously injected into BEC from the reservoir ... -
Dynamical control in a quasi-periodically modulated optical lattice
(Epl Association, European Physical Society, 2013)We investigate quantum tunneling phenomena for an optical lattice subjected to a bichromatic ac force. We show that incommensurability of the frequencies leads to super Bloch oscillation. We propose directed super Bloch ... -
The isospin admixture of the ground state and the properties of the isobar analog resonances in medium and heavy mass nuclei
(Indian Acad Sciences, 2006)Within the framework of quasiparticle random phase approximation (QRPA), Pyatov-Salamov method [23] for the self-consistent determination of the isovector effective interaction strength parameter, restoring a broken isotopic ... -
Inverted oscillator
(IOP Publishing LTD, 2006)The inverted harmonic oscillator problem is investigated quantum mechanically. The exact wavefunction for the confined inverted oscillator is obtained and it is shown that the associated energy eigenvalues are discrete, ... -
Dark and bright solitons in a Bose-Einstein condensate with a Feshbach resonance
(Royal Swedish Acad Sciences, 2007)Both dark and bright solitons are constructed exactly for a Bose - Einstein condensation with a time-dependent scattering length in an expulsive parabolic potential. It is shown analytically how the size of the cloud and ... -
Dielectric properties of some cationic forms of laponite clay
(Trans Tech Publications LTD, 2004)Laponite is synthetic smectite clay. It resembles the natural clay mineral hectorite. They have same structure and composition. Laponite is layered hydrous magnesium silicate, which is hydrothermally synthesized from simple ... -
The investigation of dielectric properties of pyrophyllite
(Trans Tech Publications LTD, 2004)Pyrophyllite, a clay mineral, is hydrous aluminum silicate which has a chemical formula of Al2Si4O10(OH)(2). Such properties of high dielectric constant (permittivity) and low electrical conductivity make it useful for ... -
Electrical conductivity, optical and structural properties of indium-doped ZnO nanofiber thin film deposited by spray pyrolysis method
(Elsevier Science BV, 2006)The indium-doped ZnO nanofiber thin film has been deposited by spray pyrolysis method. Donor level and barrier height energies for the film were determined from the temperature dependence of the conductivity and were found ... -
A new dioxime ligand and its trinuclear copper(II) complex: Synthesis, characterization and optical properties
(Elsevier Science BV, 2007)The synthesis and characterization of a new dioxime ligand, (H,L), (III) and its trinuclear copper(II) complex, [Cu3L2(H2O)(2)](ClO4)(2), (V) is described. IR spectra show that the ligand acts in a tetradentate manner and ... -
Thermally stimulated current and space charge limited current mechanism in film of the gold/zinc oxide/gold type
(Elsevier Science BV, 2007)The thermally stimulated current (TSC) and space charge limited current (SCLC) properties of n-type spray pyrolyzed ZnO thin film were investigated using TSC and current-voltage measurements. TSC measurements of the n-type ... -
Acidity study on 3-substituted pyridines
(MDPI AG, 2005)A comprehensive theoretical study for the protonation of some 3-substituted pyridines has been carried out in aqueous solution (epsilon = 78.4) by semi empirical AM1 method in MOPAC2000 and PM5 method in MOPAC2002. Solvent ... -
Intramolecular Hydrogen Bonding and Tautomerism in Schiff Bases: Synthesis, Spectroscopic and Theoretical Studies of N-(2,2 '-Methylenebis(4-methoxyphenyl)salicylidene and N-(2,2 '-Methylenebis(4-methoxyphenyl)-2-oxonaphthalidene-methylamine
(Asian Journal Of Chemistry, 2014)The new Schiff bases (4 and 5) were synthesized respectively from the reaction of 2,2'-methylenebis(4-aminomethoxybenzene) (3) with salicylaldehyde and 2-hydroxy-1-naphthaldehyde. The products have been characterized by ...