Güncel Gönderiler: FEF, Fizik Bölümü Koleksiyonu
Toplam kayıt 337, listelenen: 121-140
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Radioactivity and heavy metal concentrations in food samples from Rize, Turkey
(Wiley, 2012)BACKGROUND: Rize in Turkey was contaminated by the Chernobyl accident in 1986. A comprehensive study was planned and carried out to determine the radioactivity levels and heavy metal concentrations in four food categories ... -
Current transport mechanism in CdS thin films prepared by vacuum evaporation method at substrate temperatures below room temperature
(Elsevier, 2012)CdS thin films were deposited by vacuum deposition method at low substrate temperatures instead of the commonly used vacuum deposition at high substrate temperatures (T S > 300 K). The effect of low substrate temperature ... -
Structural and optical properties of ZnO and Al-doped ZnO microrods obtained by spray pyrolysis method using different solvents
(Elsevier, 2012)ZnO and Al-doped ZnO microrods were obtained by spray pyrolysis method using different solvents such as methanol and propanol. The effect of the type of solvent in the starting solution on the structural, morphological and ... -
Comparative study of critical current density, pinning force and levitation force behavior in Yb211 doped-Sm123 bulk superconductors
(Elsevier, 2012)The effect of Yb211 doping on the critical transition temperature (T c), c-lattice parameter, critical current density (J c), volume pinning force (F p) and the vertical levitation force density properties of MPMG-processed ... -
Microscopic study of Ca + Ca fusion
(American Physical Society, 2012)We investigate the fusion barriers for reactions involving Ca isotopes 40Ca+40Ca, 40Ca+48Ca, and 48Ca+48Ca using the microscopic time-dependent Hartree-Fock (TDHF) theory coupled with a density constraint. In this formalism ... -
AC losses in coil wound from round wire coated by a superconducting layer
(IEEE, 2012)Numerical simulations have been performed in order to predict the behavior of a round wire covered by thin superconducting layer when exposed to AC magnetic field or transporting AC current, as well as for a solenoid coil ... -
Calculation of radiation attenuation coefficients, effective atomic numbers and electron densities for some building materials
(2012)Some building materials, regularly used in Turkey, such as sand, cement, gas concrete (lightweight, aerated concrete), tile and brick, have been investigated in terms of mass attenuation coefficient, effective atomic, ... -
Investigation of structural and optical properties of ZnO films co-doped with fluorine and indium
(Elsevier, 2012)Undoped ZnO film and ZnO films, which are co-doped with F and In (FIZO) at different concentrations, were synthesized by sol-gel technique and the effects of co-doping of F and In on structural and optical properties of ... -
Heavy metal analysis around Murgul (Artvin) copper mining area of Turkey using moss and soil
(Elsevier, 2012)This research investigates heavy metal pollution around one of the most important mining areas in Turkey, the Murgul mining, by means of analyzing moss and soil samples collected in the neighborhood of the copper mining ... -
Identification of heavy metal origins related to chemical and morphological soil properties using several non-destructive X-ray analytical methods
(Kluwer Academic Publishers, 2013)Soils are complex mixtures of organic, inorganic materials, and metal compounds from anthropogenic sources. In order to identify the pollution sources, their magnitude and development, several X-ray analytical methods were ... -
Polarized-beam high-energy EDXRF in geological samples
(0-Belirlenecek, 2013)Certified reference materials (NIST 1645, BCR 143, IAEA 7, BCR 141, NIES-CRM-02, and IAEA 375) were used for determining the performance of a secondary target energy-dispersive X-ray fluorescence (EDXRF) spectrometer, ... -
Determination of trace elements in ashes of milk samples by using XRF technique
(Chemical Publishing Co., 2013)Energy dispersive X-ray fluorescence system has been used to determine the heavy metal ions present in cow's milk. Samples have been collected from farm and markets within the border of Kahramanmaras province, Turkey. An ... -
Assessment of radiological levels at schools in trabzon, turkey
(Sage Publications, 2013)In this study, a survey on environmental radioactivity in 16 high schools located in north eastern region of Turkey (the black sea region, province of Trabzon) was carried out. Indoor air radon (222Rn) concentrations were ... -
Selective radiation measurement for safety evaluation on base stations
(Gazi University, 2013)In this paper, general information about unionized radiation, standards and measurement routines for wireless communication systems, electromagnetic fields and antenna structures are given. The safety of mobile phones has ... -
Influences of ferromagnetic deflectors between layers of superconducting power transmission cables on transport current losses
(Springer International Publishing, 2014)Alternating-current losses in two-layer power transmission cables constructed by type-II superconducting strips in the presence of ferromagnetic deflectors between the layers are numerically investigated. Each layer comprises ... -
Comparison of alternating-current losses in two-layer superconducting cables constructed by shell-type and solid-core cylindrical wires
(Springer International Publishing, 2014)Alternating-current losses in two-layer power transmission cables of type-II superconducting wires with cylindrical geometry are numerically investigated with regard to wire cross section. Losses in shell-type and solid-core ... -
The effect of external electric field on mass attenuation coefficients of some semiconductor
(Taylor and Francis Inc., 2014)In this study, we measured the mass attenuation coefficient of n-type GaAs, p-type GaAs, n-type Si and Au/n-Si/n+Si/Al samples with and without external electric field. Samples were set in perpendicular direction to the ... -
Measurement of the mass attenuation coefficients and electron densities for BiPbSrCaCuO superconductor at different energies
(Elsevier, 2007)The mass attenuation coefficients for Bi, Pb, Sr, Ca, Cu metals, Bi2O3, PbO, SrCO3, CaO, CuO compounds and solid-state forms of Bi1.7Pb0.3Sr2Ca2Cu3O10 superconductor were determined at 57.5, 65.2, 77.1, 87.3, 94.6, 122 and ... -
Angular distributions of protons scattered by Ar40 nuclei with excitation of the 2+(1.46 MeV) and 3-(3.68 MeV) collective levels for incident energies of 25.1, 32.5, and 40.7 MeV
(American Physical Society, 2007)Elastic and inelastic scattering of unpolarized and polarized protons by Ar40 nuclei for incident energies between 20 and 50 MeV has been studied by reanalyzing experimental scattering spectra for the 2+(1.46 MeV) and ...