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Wyszukujesz frazę "Yildirim, T." wg kryterium: Autor


Wyświetlanie 1-7 z 7
Tytuł:
Thermally Stimulated Current Study of Shallow Traps in As-Grown $TlInSe_2$ Chain Crystals
Autorzy:
Gasanly, N.
Yildirim, T.
Powiązania:
https://bibliotekanauki.pl/articles/1505407.pdf
Data publikacji:
2011-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.55.-i
72.20.Jv
72.80.Jc
Opis:
Thermally stimulated current measurements were carried out on as-grown $TlInSe_2$ single crystals. The investigations were performed in temperatures ranging from 10 to 260 K with heating rate of 0.3 K $s^{-1}$. The analysis of the data revealed the hole traps levels located at 6 and 57 meV. The activation energies of the traps have been determined using various methods of analysis, and they agree with each other. The concentration (2.8 × $10^{13}$ and 3.4 × $10^{12} cm^{-3}$) and capture cross section (4.1 × $10^{-28}$ and 2.9 × $10^{-26} cm^2$) of the traps were estimated for peaks A and B, respectively. It was concluded that in these centers retrapping was negligible, as confirmed by the good agreement between the experimental results and the theoretical predictions of the model that assumes slow retrapping.
Źródło:
Acta Physica Polonica A; 2011, 119, 3; 437-441
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trapping Center Parameters in N-Implanted $Tl_2Ga_2S_3Se$ Single Crystals by Thermally Stimulated Currents Measurements
Autorzy:
Yildirim, T.
Gasanly, N.
Turan, R.
Powiązania:
https://bibliotekanauki.pl/articles/1400156.pdf
Data publikacji:
2013-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.55.-i
72.20.Jv
72.80.Jc
Opis:
As-grown $Tl_2Ga_2S_3Se$ crystals have been doped by ion implantation technique. The samples were bombarded at room temperature in the direction perpendicular to the layer by N ion beam of about 120 keV having dose of $1 \times 10^{16} \text{ions}//cm^2$. The effect of N implantation with annealing at 300C was studied by using thermally stimulated current measurements. The investigations were performed in temperatures ranging from 10 to 290 K. The experimental evidence was found for presence of one deep hole trapping center with activation energy of 392 meV. The capture cross-section was calculated as $3.9 \times 10^{-20} cm^2$. Also the concentration of the traps was estimated to be $8.0 \times 10^{11} cm^{-3}$.
Źródło:
Acta Physica Polonica A; 2013, 123, 4; 766-769
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Thermoluminescence Glow Peaks in β-Irradiated TlGaSeS Crystals
Autorzy:
Isik, M.
Yildirim, T.
Gasanly, N.
Powiązania:
https://bibliotekanauki.pl/articles/1398929.pdf
Data publikacji:
2016-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.60.Kn
71.55.Ak
61.82.Fk
Opis:
Thermoluminescence properties of TlGaSeS layered single crystals were investigated in the temperature range of 280-720 K. Thermoluminescence glow curve exhibited three peaks with maximum temperatures of ≈370, 437, and 490 K. Curve fitting, initial rise and peak shape methods were used to determine the activation energies of the trapping centers. All applied methods resulted with energies around 0.82, 0.91, and 0.99 eV. Dose dependence of the thermoluminescence intensity was also examined for the doses in the range of 0.7-457.6 Gy. Peak maximum intensity of the observed peak around 370 K showed an increase up to a certain dose and then a decrease at higher doses. This non-monotonic dose dependence was discussed under the light of a reported model in which different kinds of competition between radiative and nonradiative recombination centers during excitation or heating stages of the thermoluminescence process are explained.
Źródło:
Acta Physica Polonica A; 2016, 129, 6; 1165-1168
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Investigation of the Effects of Ageing Parameters on Wear Behaviours and Electrical Conductivity of Cu-Co-Be Alloys
Autorzy:
Özyürek, D.
Yıldırım, M.
Tunçay, T.
Powiązania:
https://bibliotekanauki.pl/articles/1398723.pdf
Data publikacji:
2016-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.40.Pq
Opis:
In this study, the effects of ageing parameters were investigated on wear behaviours and electrical conductivity of Cu-Co-Be alloy. The samples were quenched at room temperature after solution heat treated for 1 h. Then, ageing processes were applied for three different temperatures (470°C, 500°C, 530°C) and for three different ageing times (1, 2, 3 h). Microstructure examining, electrical conductivity and hardness measurements were carried out after ageing process. On the samples, which obtained the highest hardness values from hardness test (470°C), there were carried out wear tests with 1 m s¯¹ sliding speed under 30 N at four sliding distance (500-2000 m). Results clearly show that the highest hardness values were measured for samples aged at 470°C for 3 h and hardness values were decreased with increasing ageing temperature. The lowest weight loss values were evaluated for samples aged at 470°C for 3 h. The highest electrical conductivity values were measured at 500°C for 1 h aged samples.
Źródło:
Acta Physica Polonica A; 2016, 129, 4; 559-561
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Leaching of mersin/aydincik dolomite ore in hydrochloric acid. Dissolution rates
Autorzy:
Altiner, M.
Yildirim, M.
Yilmaz, T.
Powiązania:
https://bibliotekanauki.pl/articles/110873.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
dolomite leaching
CO2 storage
fractional life method
Opis:
In this paper dissolution of dolomite ore, collected from Mersin/Aydincik in Turkey, was investigated under various experimental conditions in the presence of HCl acid. Particle size, acid/dolomite ratio, solid/liquid ratio, stirring speed, reaction time and temperature were also conducted to the determin the optimum experimental conditions. During the experiment, CO2 amount released from the dolomite was measured through the experimental apparatus to determine reaction orders and rate constants of the sample at the different temperatures by using the fractional life approach method. It was found that, reaction orders and rate constants, based on temperatures, changed from 1.505 to 1.339 and between 3.17 and 10.49 10–2 mol dm–3 sec–1 respectively. In addition, differences in reaction rate constants were examined with the Arrhenius equation and activation energy of the dissolution process was calculated as 16.69 kJ mol–1, which was consistent with the activation energies determined in literature.
Źródło:
Physicochemical Problems of Mineral Processing; 2016, 52, 2; 536-550
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-strand conformation polymorphism-based genetic characterization of the Cyclospora cayetanensis strains collected from different provinces in Turkey
Autorzy:
Cicek, M.
Yıldırım, İ.H.
Cengiz, Z.T.
Karaman, Ü.
Powiązania:
https://bibliotekanauki.pl/articles/28762778.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2021, 28, 2; 267-270
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and Characterization of Gd₂O₂SO₄:Pr⁺³ Scintillation Material Produced by Sol-Gel Process for Digital Imaging System
Autorzy:
Aritman, I.
Yildirim, S.
Kisa, A.
Guleryuz, L.
Yurddaskal, M.
Dikici, T.
Celik, E.
Powiązania:
https://bibliotekanauki.pl/articles/1033327.pdf
Data publikacji:
2017-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.55.Hx
Opis:
Scintillation materials are widely used in digital X-ray imaging applications, radiotherapy applications coupled with suitable photoreceptors. Gd₂O₂SO₄ (GOS) scintillator doped with trivalent praseodymium (Pr⁺³) presented high X-ray absorption properties and good spectral compatibility which were utilized extensively for imaging system of X-ray microscopy, soft X-ray phosphor screen for water window. In this study, GOS:0.01Pr⁺³ scintillation material was synthesized by unique sol-gel process which was not previously applied and its characterization properties were investigated. Structure and luminescence properties of GOS:Pr⁺³ were optimized by utilizing X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and luminescence spectroscopy.
Źródło:
Acta Physica Polonica A; 2017, 131, 1; 106-108
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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