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Articles 1 - 30 of 51
Full-Text Articles in Physics
The Results Of The First Photonuclear Reaction Performed In Turkey: The Zinc Example, İsmai̇l Boztosun, Haris Dapo, Süleyman Fati̇h Özmen, Yi̇ği̇t Çeçen, Mesut Karakoç, Abdullah Çoban, Alp Cesur, Tanfer Caner, Edi̇p Bayram, Gi̇zem Büşra Keller, Beyza Küçük, Abdullah Güvendi̇, Melek Derman, Deni̇z Kaya
The Results Of The First Photonuclear Reaction Performed In Turkey: The Zinc Example, İsmai̇l Boztosun, Haris Dapo, Süleyman Fati̇h Özmen, Yi̇ği̇t Çeçen, Mesut Karakoç, Abdullah Çoban, Alp Cesur, Tanfer Caner, Edi̇p Bayram, Gi̇zem Büşra Keller, Beyza Küçük, Abdullah Güvendi̇, Melek Derman, Deni̇z Kaya
Turkish Journal of Physics
We have investigated the decays of several zinc isotopes produced by photonuclear reactions, which were induced by bremsstrahlung photon beams from a clinical e-linac. A photon beam of 18 MeV endpoint energy was directed at a target consisting of primarily zinc isotopes in their natural abundances. Subsequently, the induced decays of unstable zinc isotopes were measured with an HPGe detector twice, once shortly after irradiation and once on the following day. Decays of Zn-63, Zn-65, Zn-69m, and Cu-67 were measured and fitted. In addition, the gamma energy levels of the daughters of these decays were measured with good accuracy. All …
Theoretical Investigations Of Pt_3x (X = Al, Sc, Hf, Zr) Ground State, Adewumi Isaac Popoola, Lesley Heath Chown, Lesley Alison Cornish
Theoretical Investigations Of Pt_3x (X = Al, Sc, Hf, Zr) Ground State, Adewumi Isaac Popoola, Lesley Heath Chown, Lesley Alison Cornish
Turkish Journal of Physics
The electronic structure of Pt_3X compounds showed that Pt_3Hf and Pt_3Zr were more stable for the D0_{24} structure, rather than L1_2. The compound Pt_3Al was predicted to be the hardest and most ductile, but not with the L1_2 structure at ground state. The density of states showed that Pt_3Hf, Pt_3Zr, and Pt_3Al can be stabilized to the L1_2 phase with suitable element addition. All calculations were done within the density functional theory framework.
Evidence That Photons Have Extension In Space, Randy Wayne
Evidence That Photons Have Extension In Space, Randy Wayne
Turkish Journal of Physics
Satyendra Nath Bose realized that there was a logical inconsistency in the derivation of Planck's radiation law since the derivation used to obtain the temperature-independent prefactor in the blackbody radiation law had been based in part on classical wave hypotheses, such as the number of degrees of freedom of the ether. Bose worked out a strictly quantum derivation by combining the quantum hypothesis with statistical mechanics to determine the number of states of each mode that would occupy a 6-dimensional phase space. Here I use the model of an extended photon to show that the temperature-independent prefactor of Planck's radiation …
Deriving The Snel-Descartes Law For A Single Photon, Randy Wayne
Deriving The Snel-Descartes Law For A Single Photon, Randy Wayne
Turkish Journal of Physics
The laws of reflection and refraction are typically derived using a dispersion relation that assumes that the angular frequency stays the same across a vacuum--dielectric interface and that the angular wave number increases. At the single photon level, this means that the total energy of the photon is conserved but the linear momentum is not. Here I derive the laws of reflection and refraction for a single photon using a dispersion relation that is consistent with the conservation of both total energy and linear momentum. To ensure that both conservation laws are upheld, the optical path length must be considered …
Thermodynamic Properties Of A Rotating Bose-Einstein Condensation In A Deep Optical Lattice, Hend A. Abdel-Gany, Ali Y. Ellithi, Abdelhamid A. Galal, Ahmed Hassan
Thermodynamic Properties Of A Rotating Bose-Einstein Condensation In A Deep Optical Lattice, Hend A. Abdel-Gany, Ali Y. Ellithi, Abdelhamid A. Galal, Ahmed Hassan
Turkish Journal of Physics
In this paper, we suggest a conventional semiclassical approximation to calculate several thermodynamic quantities of a rotating Bose-Einstein condensation in a deep optical lattice. Expressions for the condensation fraction, critical temperature, and heat capacity are derived analytically. These expressions are obtained by considering the standard harmonic approximation of the deep optical lattice potential. The suggested approach is able to include the the finite size and the positive chemical potential effects simultaneously. The advantage of our suggested approach is in its simplicity, in comparison to the quantum-mechanical calculations (Bose-Hubbard model). Moreover, its generality allows the treatment of a finite temperature regime
Soret And Dufour Effects On An Mhd Free Convective Flow Through A Channel Bounded By A Long Wavy Wall And A Parallel Flat Wall, Nazibuddin Ahmed, Kalpana Sarma, Hiren Deka
Soret And Dufour Effects On An Mhd Free Convective Flow Through A Channel Bounded By A Long Wavy Wall And A Parallel Flat Wall, Nazibuddin Ahmed, Kalpana Sarma, Hiren Deka
Turkish Journal of Physics
This paper presents Soret and Dufour effects on a 2-dimensional free convective magnetohydrodynamic (MHD) flow of a viscous incompressible and electrically conducting fluid through a channel bounded by a long vertical wavy wall and a parallel flat wall. A uniform magnetic field is assumed to be applied perpendicular to the flat wall. Governing equations of the fluid flow and heat and mass transfer are solved analytically subject to the relevant boundary conditions. It is assumed that the solution consists of 2 parts, a mean part and a perturbed part. The long wave approximation has been used to obtain the solution …
Transmission Of A Broadband Light Through A Fiber Optic Loop: Effect Of Nonlinear Refractive Index, Erkin Zakhidov, Abdumutallib Kokhkharov, Farrukh Mirtagjiev, Sherzod Nematov, Ilkhom Todjiboev, Olga Trunilina
Transmission Of A Broadband Light Through A Fiber Optic Loop: Effect Of Nonlinear Refractive Index, Erkin Zakhidov, Abdumutallib Kokhkharov, Farrukh Mirtagjiev, Sherzod Nematov, Ilkhom Todjiboev, Olga Trunilina
Turkish Journal of Physics
The results of studies of broadband light transmission through a fiber loop and a double loop under the effect of nonlinear refractive index are presented in this paper. Fiber loop and double loop transmission/reflection vs. a coupler splitting ratio at various powers of the light with a spectral width of approximately 35 nm are studied and high efficient nonlinear light switching is demonstrated. It is shown that a double loop formed by consecutive connecting 2 fiber loops allows us to exclude the strong spectral dependence of light transmission/reflection and to distribute input light equally between them. Such all-fiber devices can …
A Model Of The Multijunction Ac Josephson Effect In A Superconductor, Mohammed Rafiqul Islam, Habibur Rahman
A Model Of The Multijunction Ac Josephson Effect In A Superconductor, Mohammed Rafiqul Islam, Habibur Rahman
Turkish Journal of Physics
We present a model of the multijunction ac Josephson effect in a superconductor. Josephson predicted that at a finite applied voltage (V_o) an alternating supercurrent of frequency \omega_J =2eV_o/\hslash flows between 2 superconductors separated by an insulating layer, called the ac Josephson effect. Adding 2 or more Josephson junctions (so-called multijunction) with an applied voltage, we have shown that the resultant current (which is equivalent to the vector sum of the currents in each junction) has the same frequency as the single Josephson junction. The amplitude of the resultant current for the multijunction is increased with the increasing number of …
Analytical Solution Of The Klein-Gordon Equation Under The Coulomb-Like Scalar Plus Vector Potential With The Laplace Transforms Approach, Ebrahim Momtazi, Ali Akbar Rajabi, Bentol Hoda Yazarloo, Hassan Hassanabadi
Analytical Solution Of The Klein-Gordon Equation Under The Coulomb-Like Scalar Plus Vector Potential With The Laplace Transforms Approach, Ebrahim Momtazi, Ali Akbar Rajabi, Bentol Hoda Yazarloo, Hassan Hassanabadi
Turkish Journal of Physics
In this paper, analytical solution of the Klein-Gordon equation with Coulomb-like scalar plus vector potentials is obtained exactly. We considered the Laplace transform approach in our calculation. The exact bound state energy eigenvalues and the corresponding eigenfunctions are reported for various values of the quantum numbers n and l.
Aldimine Derivatives As Photosensitizers For Dye-Sensitized Solar Cells, Amal Y. Batniji, Rami Morjan, Monzir S. Abdel-Latif, Taher M. El-Agez, Sofyan A. Taya, Hatem S. El-Ghamri
Aldimine Derivatives As Photosensitizers For Dye-Sensitized Solar Cells, Amal Y. Batniji, Rami Morjan, Monzir S. Abdel-Latif, Taher M. El-Agez, Sofyan A. Taya, Hatem S. El-Ghamri
Turkish Journal of Physics
Five aldimine derivatives were prepared by condensation of the appropriate amine with salicylaldehyde (m1-m4) and 4-aminobenzoic acid with 2-thiophene carboxaldehyde (m5). A molar ratio of 1:1 was used and the mixture was refluxed in ethanol for 2 h to obtain the corresponding aldimine derivative. These derivatives were used as photosensitizers for dye-sensitized solar cells (DSSCs). The best performance was obtained for the DSSC sensitized with 2-(2-hydroxybenzylideneamino)benzoic acid, for which a short-circuit current of 2.86 mA/cm^2, an open-circuit voltage of 0.562 V, and an efficiency of 0.575% were obtained.
Effect Of Gain Saturation On The Nonlinear Dynamical Behavior Of Optically Injected Semiconductor Lasers, Furat Ahmad Al-Saymari, Imad Al-Deen Hussein Al-Saidi, May Jassim Ashoor
Effect Of Gain Saturation On The Nonlinear Dynamical Behavior Of Optically Injected Semiconductor Lasers, Furat Ahmad Al-Saymari, Imad Al-Deen Hussein Al-Saidi, May Jassim Ashoor
Turkish Journal of Physics
We studied numerically the dynamics and bifurcations route to chaos of an optically injected semiconductor laser. The sequence of bifurcations mainly followed the period-doubling scenario. Observations of different kinds of injected semiconductor laser dynamical behaviors including stable state, periodic oscillation state, quasi-periodic oscillation state, co-existence of periodic and chaotic states, and period-3 and period-6 oscillation states are reported. The existence of isolated branches created from a sudden jump in the dynamics of the semiconductor laser was also observed in the bifurcation diagram. In order to draw a detailed picture for the dynamical behavior of the semiconductor laser, we constructed color …
Properties Of Pbs Thin Films Grown On Glass And Layered Gase Crystal Substrates By Chemical Bath Deposition, Mevlüt Karabulut, Hüseyi̇n Ertap, Hasan Mammadov, Güventürk Uğurlu, Mustafa Kemal Öztürk
Properties Of Pbs Thin Films Grown On Glass And Layered Gase Crystal Substrates By Chemical Bath Deposition, Mevlüt Karabulut, Hüseyi̇n Ertap, Hasan Mammadov, Güventürk Uğurlu, Mustafa Kemal Öztürk
Turkish Journal of Physics
PbS thin films were grown on glass and GaSe crystal substrates by chemical bath deposition and their structural, morphological, optical, and electrical properties were investigated. PbS films grew in cubic structure with lattice constants equal to 5.9315 Å and 5.9362 Å for films grown on glass and GaSe crystal, respectively. The band gaps of the PbS films were determined to be 1.60 eV. The long wavelength tails of absorption spectra showed exponential dependence on the incident photon energy according to the Urbach-Martiensen model. Electrical properties of PbS films were investigated by the van der Pauw method, which showed that PbS …
Xrd, Xps, And Optical Characterizations Of Al-Doped Zno Film Grown On Gaas Substrate, Ebru Şenadim Tüzemen, Hülya Şahi̇n, Kamuran Kara, Sezai̇ Elagöz, Ramazan Esen
Xrd, Xps, And Optical Characterizations Of Al-Doped Zno Film Grown On Gaas Substrate, Ebru Şenadim Tüzemen, Hülya Şahi̇n, Kamuran Kara, Sezai̇ Elagöz, Ramazan Esen
Turkish Journal of Physics
A ZnO:Al (10%) thin film was prepared on GaAs(100) substrate by using a pulsed filtered cathodic vacuum arc deposition (PFCVAD) system. The ZnO:Al thin film was thermally annealed for 1 h at 2 different temperatures in air. The film structure was investigated as a function of annealing temperature by X-ray diffraction (XRD). ZnO:Al film annealed at 500 °C by PFCVAD method resulted in an amorphous film. However, after annealing ZnO:Al film at 600 °C, it showed (100) and (002) peaks at around 32° and 34°, respectively. The chemical state of ZnO:Al (AZO) film on GaAs substrate was investigated by using …
Deposition And Characterization Of Pbo--Pbs Multilayer Thin Films By Solution Growth Technique, Dominic Eya
Deposition And Characterization Of Pbo--Pbs Multilayer Thin Films By Solution Growth Technique, Dominic Eya
Turkish Journal of Physics
PbO-PbS thin films were deposited on glass substrates using the chemical bath deposition (CBD) technique. PbO thin films were deposited from the solution of lead nitrate (Pb(NO_3)_2) and sodium hydroxide (NaOH). Ethylenediaminetetraacetate (EDTA) served as the complexing agent. Some of the PbO films were used as substrate for the deposition of PbS. The PbS was deposited from alkaline solution of lead nitrate and thioacetamide. Triethanolamine was used as the complexing agent. Some of the films were subjected to thermal treatment after deposition. Energy dispersive X-ray fluorescence analysis confirmed the presence of Pb and S in the PbS thin films, while …
Quantum Chemical Calculations Of The Polymorphic Phase Transition Temperatures Of Zns, Znse, And Znte Crystals, Raşi̇t Ahiska, Dmytro Freik, Taras Parashchuk, Igor Gorichok
Quantum Chemical Calculations Of The Polymorphic Phase Transition Temperatures Of Zns, Znse, And Znte Crystals, Raşi̇t Ahiska, Dmytro Freik, Taras Parashchuk, Igor Gorichok
Turkish Journal of Physics
Molecular models of polymorphs modifications of zinc chalcogenides have been designed. Based on the results of ab initio quantum chemical calculations of the crystal structure of clusters the temperature dependences of the Gibbs energy of sphalerite and of wurtzite have been found. Phase transformations \"sphalerite-wurtzite\" temperatures have been evaluated.
Photovoltaic Enhancement Of Si Micro- And Nanostructure Solar Cells Via Ultrafast Laser Texturing, Falah A. H. Mutlak
Photovoltaic Enhancement Of Si Micro- And Nanostructure Solar Cells Via Ultrafast Laser Texturing, Falah A. H. Mutlak
Turkish Journal of Physics
The purpose of the present study was to achieve laser-microtextured Si structures, the material used as silicon wafers, with a thickness of 330 mu m for a fast laser texturing technique, in order to produce micro-/nanosurface textures by means of a UV femtosecond laser. A textured silicon surface was prepared that has the capability to trap light, thereby greatly reducing the visible light reflection for photovoltaic cells. The textured surface was measured by scanning electron microscope. The results showed a photocurrent increase of about 25% in the laser-textured zones.
Structural, Physical, And Electrical Properties Of Boro-Vanadate-Iron Glasses Doped With K_2o Alkali, Harshvadan R. Panchal
Structural, Physical, And Electrical Properties Of Boro-Vanadate-Iron Glasses Doped With K_2o Alkali, Harshvadan R. Panchal
Turkish Journal of Physics
The structural, physical, and electrical properties of semiconducting oxide glasses with composition xK_2O: (95-X) [B_2O_3: 2V_2O_5]: 5Fe_2O_3 (0 \le x \le 30) have been studied. The glasses were prepared by splat-quenching method. Fourier transform infrared spectroscopy (FTIR) studies of these glasses were carried out to study the effect of the modifier and glass former in the glasses. These changes in the molecular structure, bond length, and vibrational group were studied in the spectral range of 400-1350 cm^{-1}. The increase in the intensity and shifting of vibrational bands occurred towards lower wave numbers at 1400-1350 cm^{-1}, 1200 cm^{-1}, and 100-940 cm^{-1}. …
Influence Of Composition On The Structure And Optoelectronic Properties Of Pb_Xin_{25-X}Se_{75} Thin Films, Hesham Azmi Elmeleegi, Zeinab El Sayed El Mandouh, Ahmed Abdel Moez
Influence Of Composition On The Structure And Optoelectronic Properties Of Pb_Xin_{25-X}Se_{75} Thin Films, Hesham Azmi Elmeleegi, Zeinab El Sayed El Mandouh, Ahmed Abdel Moez
Turkish Journal of Physics
Pb_xIn_{25-x}Se_{75} thin films with 2 compositions were prepared by thermal evaporation. The surface topography of these films was studied by transmission electron microscope. The optical reflectance and transmittance were studied in order to determine the optical parameters such as optical energy gap, refractive index, extinction coefficient, dielectric loss, and dielectric tangent loss for these films. A single oscillator theory equation was applied for these films in order to determine both dispersion energy and oscillating energy, and the ratio of free carrier concentration/effective mass (N/m*) was determined optically. It was found that change in the composition of these films affects strongly …
Representation Of Electromagnetic And Gravitoelectromagnetic Poynting Theorems In Higher Dimensions, Mustafa Emre Kansu, Murat Tanişli, Süleyman Demi̇r
Representation Of Electromagnetic And Gravitoelectromagnetic Poynting Theorems In Higher Dimensions, Mustafa Emre Kansu, Murat Tanişli, Süleyman Demi̇r
Turkish Journal of Physics
This study investigates whether the electromagnetic and gravitoelectromagnetic energy conservation equations are obtained together by using octonion algebra or not. Maxwell and Maxwell-like equations for linear gravity with magnetic monopole terms are used in the SI unit system. A new complex octonionic field term is suggested for the first time. The complex octonionic source equation is then obtained. Finally, Poynting theorems for both electromagnetism and gravitoelectromagnetism are defined for the first time by using higher dimensional algebra.
Fast Numerical Algorithm For A High-Precision 6d Electromagnetic Positioning Navigation System, Qian Xiang, Shiqing Wang, Haifeng Liu
Fast Numerical Algorithm For A High-Precision 6d Electromagnetic Positioning Navigation System, Qian Xiang, Shiqing Wang, Haifeng Liu
Turkish Journal of Physics
A fast numerical algorithm is proposed for the 6 degrees of freedom electromagnetic navigation system, which can be used to improve surgical operations guided by medical images. Both the rotation transformation technique and optimization technique are adopted in the algorithm. The results from simulations show that the calculating time is improved greatly under the required precision in the surgery. A navigation system based on the algorithm can make the medical device's dimensions miniaturized and the structure simplified and portable. The performance and application scope of the electromagnetic positioning navigation system can be improved.
Octonion Symmetric Dirac-Maxwell Equations, Bhupesh Chandra Chanyal
Octonion Symmetric Dirac-Maxwell Equations, Bhupesh Chandra Chanyal
Turkish Journal of Physics
We know that the octonion algebra is the largest division algebra. Therefore, we have discussed the octonion 8-dimensional space as the combination of 2 (external and internal) 4-dimensional spaces. The octonion wave equations in terms of 8 components has been written in terms of an 8 x 8 matrix. Octonion forms of potential as well as fields equations of dyons in terms of an 8 x 8 matrix are discussed in a consistent manner. At last, we have obtained the generalized Dirac-Maxwell equations of dyons in two 4-dimensional spaces, from the 8 x 8 matrix representation of octonion wave equations. …
Perturbative Approach To The Spin-Flavor Precession Of Majorana-Type Solar Neutrinos, Deni̇z Yilmaz
Perturbative Approach To The Spin-Flavor Precession Of Majorana-Type Solar Neutrinos, Deni̇z Yilmaz
Turkish Journal of Physics
Spin-flavor precession (SFP) of Majorana-type solar neutrinos is investigated in the case of 2 generations. The evolution equation in the SFP framework is solved by using the perturbative method, in which mu B is accepted to be small. The approximate analytical formula including SFP effect is provided.
Magnetized Kantowski-Sachs Bulk Viscous String Cosmological Models With Decaying Vacuum Energy Density Lambda (T), Kanika Das, Nawsad Ali
Magnetized Kantowski-Sachs Bulk Viscous String Cosmological Models With Decaying Vacuum Energy Density Lambda (T), Kanika Das, Nawsad Ali
Turkish Journal of Physics
In this paper, we deal with bulk viscous magnetized Kantowski-Sachs string cosmological models in the presence of time variable cosmological term Lambda . To obtain a deterministic model, we assume the conditions sigma infty theta and zeta theta = constant, where sigma is the shear, theta the expansion in the model, and zeta the coefficient of bulk viscosity. The value of cosmological constant for the models is found to be small and positive, which is supported by the results from recent observations (SN 1a). The behavior of the model in the presence and absence of magnetic fields together with physical …
Analogue And Digital Analysis Of The Effects Of Some Parameters In Determination Of The Best Experimental Energy Resolution, Eli̇f Ebru Ermi̇ş, Gözde Tektaş, Ercan Pi̇li̇çer, Cüneyt Çeli̇ktaş, Jiri Pechousek
Analogue And Digital Analysis Of The Effects Of Some Parameters In Determination Of The Best Experimental Energy Resolution, Eli̇f Ebru Ermi̇ş, Gözde Tektaş, Ercan Pi̇li̇çer, Cüneyt Çeli̇ktaş, Jiri Pechousek
Turkish Journal of Physics
The gamma-ray energy spectrum of ^{137}Cs was obtained according to different parameters such as preamplifier capacitance, the amplifier's coarse gain level, power supply voltage for the detector, and source-to-detector distance. This investigation was performed with both analogue and digital methods. In order to examine the effects of these parameters on energy resolution, a NaI(Tl) inorganic scintillation detector was used. In addition, the gamma energy spectrum of the radioisotope was obtained by means of FLUKA, which is one of the Monte Carlo simulation programmes. Energy resolution of the detector by these 3 methods was calculated. These resolution values were compared with …
Double Pulse Generation In A Highly Nonlinear Gaas Optical Waveguide, Jian Wei Wu
Double Pulse Generation In A Highly Nonlinear Gaas Optical Waveguide, Jian Wei Wu
Turkish Journal of Physics
This paper presents a simulation and investigation about the nonlinear interplay between an optical pulse and GaAs waveguide. The results obtained show that the nonlinear processes including self-phase modulation, 2-photon absorption, and free carrier related effects will have significant influences on the temporal shape and frequency spectrum of a propagating pulse in the GaAs waveguide with the result that 2-photon absorption can extend the pulse duration that can be again compressed by the free carrier absorption. The outcome spectrum is also asymmetrical due to the free carrier related effects, which takes on a complicated oscillation structure resulting from the interference. …
Incidence Angle And Spectral Effects On Vertical Junction Silicon Solar Cell Capacitance, Moustapha Sane, Gökhan Şahi̇n, Fabe Idrissa Barro, Amadou Seidou Maiga
Incidence Angle And Spectral Effects On Vertical Junction Silicon Solar Cell Capacitance, Moustapha Sane, Gökhan Şahi̇n, Fabe Idrissa Barro, Amadou Seidou Maiga
Turkish Journal of Physics
The aim of this work is to present a theoretical study of a vertical junction silicon solar cell under monochromatic illumination. By solving the continuity equation and using a one-dimensional model in frequency modulation, we derive the analytical expressions of both excess minority carrier density and photovoltage. Based on these expressions, the solar cell capacitance was calculated; we then exhibited the effects of both illumination wavelength and incidence angle on the solar cell capacitance.
Annealing Effect On Zinc Nanoferrite Particles Synthesized By Spray Pyrolysis Of Polymer Precursor, Jessyamma Kurian, Subin John, Jacob Mathew
Annealing Effect On Zinc Nanoferrite Particles Synthesized By Spray Pyrolysis Of Polymer Precursor, Jessyamma Kurian, Subin John, Jacob Mathew
Turkish Journal of Physics
Nanosized zinc ferrite particles, prepared by spray pyrolysis method, were investigated by X-ray diffraction, transmission electron microscopy, energy dispersive spectroscopy, Fe^{57} Mossbauer spectroscopy, and vibrating sample magnetometer. The cubic crystalline phases were identified in all samples. The lattice parameter (a = 8.446 Å) and the average particle size of all the samples were determined. The particle sizes increased as the annealing temperature increased from 250 °C to 550 °C. The variation in structural parameters and particle size estimated from X-ray diffraction patterns of heat-treated samples suggested that the synthesized sample was in a `metastable' state or a compositionally constrained state. …
Annealing Effects Of Zno Thin Films On P-Si(100) Substrate Deposited By Pfcvad, Kamuran Kara, Ebru Şenadim Tüzemen, Ramazan Esen
Annealing Effects Of Zno Thin Films On P-Si(100) Substrate Deposited By Pfcvad, Kamuran Kara, Ebru Şenadim Tüzemen, Ramazan Esen
Turkish Journal of Physics
In this study, ZnO films were prepared on p-Si substrates using the pulsed filtered cathodic vacuum arc deposition (PFCVAD) method. We report the effect of annealing temperature on structural and optical properties. The crystallographic structure and the size of the crystallites in the films were studied by means of X-ray diffraction. The films had a weak peak (100) orientation at 2theta = sim 32°. X-ray diffraction analysis of the as-deposited ZnO and the film annealed at 850 °C showed a strong ZnO (002) diffraction peak centered at 34.1° and 34.5°, respectively. The (004) peak was seen for film annealed at …
An Investigation On Silar Deposited Cu_Xs Thin Films, Aykut Astam, Yunus Akaltun, Muhammet Yildirim
An Investigation On Silar Deposited Cu_Xs Thin Films, Aykut Astam, Yunus Akaltun, Muhammet Yildirim
Turkish Journal of Physics
A copper sulfide thin film was deposited on glass substrate by successive ionic layer adsorption and reaction method at room temperature, using cupric sulfate and sodium sulfide aqueous solutions as precursors. The structural, surface morphological, optical, and electrical properties of the as-deposited film were investigated via X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, optical absorption, and d.c. 2-point probe methods. The film was found to be amorphous, dense, and uniform. Average atomic percentage of Cu:S in the as-deposited film was calculated as 63:37. The band gap energy of copper sulfide thin film was found to be 2.14 eV …
Neutron-Rich ^{208}Pb Nucleus With Delta Excitation Under Compression, Mohammed Hassen Eid Abu-Sei'leek
Neutron-Rich ^{208}Pb Nucleus With Delta Excitation Under Compression, Mohammed Hassen Eid Abu-Sei'leek
Turkish Journal of Physics
The spherical Hartree-Fock approximation is applied to a no-core shell model with a realistic effective baryon-baryon interaction. The ground state properties of a heavy spherical neutron-rich doubly magic ^{208}Pb nucleus under compression are investigated. It is found that the nucleus becomes more bound with the occurrence of Delta resonances. The creation of Delta increases as the compression is continuous. There is a considerable reduction in the compressibility when the Delta degree of freedom is activated. It is found that the Delta particle is the basic component of the ^{208}Pb nucleus besides nucleons at the ground state without any compression. When …