Güncel Gönderiler: Fizik Bölümü Koleksiyonu
Toplam kayıt 189, listelenen: 41-60
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Raman scattering under pressure and the phase transition in epsilon-GaSe
(Wiley-V C H Verlag Gmbh, 2003)Raman scattering in epsilon-GaSe has been investigated at room temperature in a diamond anvil cell by using helium gas as a pressure transmitting medium. The first observation of the solid-solid phase transition under ... -
Effects of supersymmetric CP phases on chargino-pair production via the Drell-Yan process at the CERN LHC
(Amer Physical Soc, 2004)We compute the rates for pp annihilation into chargino pairs via the Drell-Yan process taking into account the effects of supersymmetric soft phases, at a proton-proton collider. In particular, the phase of the mu parameter ... -
Origins of Reverse Bias Currents in a Typical BPW34 Photodiode
(Scientific Technical Research Council Turkey-Tubitak, 2005)Measurements of the dark reverse current in a typical BPW34 silicon photodiode have been made in the temperature range 100-300 K at various reverse bias voltages ranging from 0 to 60 V. Various transport models have been ... -
Tunnelling enhanced recombination in polycrystalline CdS/CdTe and CdS/Cu(In,Ga)Se-2 heterojunction solar cells
(Pergamon-Elsevier Science Ltd, 2005)This article investigates the results of current-voltage measurements made at different temperatures on vacuum deposited ZnO/CdS/Cu(In,Ga)Se-2 and CdS/CdTe heterojunction solar cells. We propose that the current-voltage ... -
Corrected infrared Sellmeier coefficients for gallium selenide
(Amer Inst Physics, 2005)We have measured the room-temperature refractive indices of GaSe throughout the 0.7-1.4 and 2.4-5 mu m ranges using the minimum-deviation method of light through a prism with polarization either parallel (extraordinary ... -
Tunneling-Enhanced Recombination in Polycrystalline CdS/CdTe Solar Cells
(Scientific Technical Research Council Turkey-Tubitak, 2006)The dominant dark current transport mechanism in as-grown and CdCl2 processed CdS/CdTe heterojunction solar cells for temperatures below 300 K was investigated. The current-voltage properties of these solar cells is explained ... -
Comparative study of ZnCr2O4-K2CrO4 ceramic humidity sensor using computer controlled humidity measurement set-up
(Elsevier Science Sa, 2006)A home-made ZnCr2O4-KCrO4 ceramic humidity sensor was studied using a commercially available reference humidity sensor, SHT75 from Sensirion. The main advantages of our developed set-up for humidity measurements are low ... -
Lattice vibrations of pure and doped GaSe
(Pergamon-Elsevier Science Ltd, 2006)The Bridgman method is used to grow especially undoped and doped single crystals of GaSe. Composition and impurity content of the grown crystals were determined using X-ray fluorescence (XRF) method. X-ray diffraction, ... -
N-salicylidene anilines and their copper complexes: comparative investigations of mesomorphic, morphologic, thermotropic and thermodynamical properties
(Taylor & Francis Ltd, 2006)In this work comparative studies of the mesomorphic and morphologic properties and thermal behaviour of new Schiff base N-salicylidene aniline ligands and the effects of Cu(II) additions on these properties have been carried ... -
Forward and reverse current-voltage-temperature characteristics of a typical BPW34 photodiode
(Pergamon-Elsevier Science Ltd, 2006)The dark forward and reverse current-voltage characteristics of a typical BPW34 silicon photodiode have been investigated in the temperature range 80-300 K. We propose that tunnelling enhanced recombination at or close to ... -
Effect of thickness of liquid crystalline layer on the thermotropic and thermodynamical properties of nematic-isotropic liquid and istropic liquid-nematic phase transitions
(World Scientific Publ Co Pte Ltd, 2006)In this work, effect of thickness of the liquid crystalline layer on the morphologic, thermotropic and thermodynamical properties of the nematic-isotropic liquid and isotropic liquid-nematic phase transitions in Shiff based ... -
A study on the humidity sensing properties of ZnCr2O4-K2CrO4 ionic conductive ceramic sensor
(Elsevier Science Sa, 2006)The response to humidity of ZnCr2O4-K2CrO4 ceramic composites formed by solid-state reaction at elevated temperatures is studied. The fired ceramic body, which proved to be mainly constructed from ZnCr2O4 spinel grains, ... -
Measurement and comparison of complex impedance of silicon p-i-n photodiodes at different temperatures
(Maik Nauka/Interperiodica/Springer, 2007)The dark alternating current (ac) parameters of BPW34 and BPW41 (Vishay-Telefunken) silicon p-i-n photodiodes arc measured and compared at different temperatures using the impedance spectroscopy technique. The impedance ... -
Investigation of heat capacities of proteins by statistical mechanical methods
(Elsevier Science Bv, 2007)In this study additional heat capacity of the proteins in water dissociation have been investigated by statistical mechanical methods. For this purpose, taking electric field E and total dipole moment M as thermodynamical ... -
Electronic aspects of the martensitic transition in Ni-Mn based Heusler alloys
(Elsevier, 2007)The martensitic transformation temperature Ms depends linearly on the valence electron concentration for Ni-Mn-X Heusler systems where X is a group III-group V element. However, the slopes of the linearity are different ... -
Squark pair production in the MSSM with explicit CP violation
(Amer Physical Soc, 2007)We analyze effects of the CP-odd soft phases in the MSSM on the pair productions of colored superpartners in pp collisions at the LHC energies. We find that, among all pair-production processes, those of the scalar quarks ... -
CMS physics technical design report, volume II: Physics performance
(Iop Publishing Ltd, 2007)CMS is a general purpose experiment, designed to study the physics of pp collisions at 14 TeV at the Large Hadron Collider ( LHC). It currently involves more than 2000 physicists from more than 150 institutes and 37 ... -
Design, performance, and calibration of CMS forward calorimeter wedges
(Springer, 2008)We report on the test beam results and calibration methods using high energy electrons, pions and muons with the CMS forward calorimeter (HF). The HF calorimeter covers a large pseudorapidity region (3 <= vertical bar eta ... -
Thermo-morphological properties of the smectic C* mesophase in new chiral salicyaldimine liquid crystals
(Wiley-V C H Verlag Gmbh, 2008)Specific textures and their temperature transformations in large temperature interval for the chiral smectic C* mesophase of new liquid crystalline materials, synthesized by our group, have been investigated in detail. ... -
Simulation for capacitance correction from Nyquist plot of complex impedance-voltage characteristics
(Pergamon-Elsevier Science Ltd, 2008)The impression of series resistance on unipolar semiconductor device's capacitance-voltage spectrum is discussed by conventional impedance and admittance analysis, and it is shown that series resistance may cause large ...
