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Wyszukujesz frazę "Er, K." wg kryterium: Wszystkie pola

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    Wyświetlanie 1-14 z 14
    Tytuł:
    Photoactivation Analysis of Mineral Trioxide Aggregate: Preliminary Results
    Autorzy:
    Eke, C.
    Er, K.
    Segebade, C.
    Boztosun, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031466.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    25.20.-x
    29.20.Ej
    Opis:
    The purpose of this study is to qualitatively analyse the elemental components of a mineral trioxide aggregate material using photoactivation. The material was irradiated for two hours using bremsstrahlung photons with an end-point energy of 18 MeV from a clinical electron linear accelerator. After irradiation the gamma-ray emission of the sample was counted by gamma spectrometry using a high-purity germanium (HPGe) detector. The gamma-ray spectra were analyzed by computer software. Major and trace elements were detected.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 869-871
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Cu²⁺ Ion Irradiation on Microstructure of Er₂O₃ Coating Layer Formed by MOCVD Method
    Autorzy:
    Tanaka, M.
    Takezawa, M.
    Hishinuma, Y.
    Tanaka, T.
    Muroga, T.
    Ikeno, S.
    Lee, S.
    Matsuda, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032912.pdf
    Data publikacji:
    2017-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    nuclear fusion
    coating
    Er2O3
    thin film
    TEM
    SEM and XRD
    Opis:
    Erbium oxide (Er₂O₃) coating is one of the promising methods to restrict tritium permeation and the magneto hydrodynamic pressure drop for advanced breeding blanket systems. Er₂O₃ coating layer on large interior surface area of metal pipe is deposited by using metal organic chemical vapor deposition process. In this work, the influence of Cu²⁺ ion irradiation on microstructure of Er₂O₃ coating layer on stainless steel 316 (SUS 316) substrate by metal organic chemical vapor deposition methods was investigated using scanning electron microscopy, transmission electron microscopy observation and X-ray diffraction analysis. Microstructure observation of Er₂O₃ coating was carried out after 0.00-1.50 dpa Cu²⁺ ion irradiation at 298 K and 773 K. Scanning electron microscopy observation of the surface area on Er₂O₃ thin film revealed the crack generation on surface after Cu²⁺ ion irradiation. X-ray diffraction peaks were identified in Er₂O₃ after Cu²⁺ ion irradiation transmission electron microscopy observations, the formation of interlayer between Er₂O₃ coating and SUS substrate was confirmed. According to transmission electron microscopy-energy dispersive spectroscopy, the interlayer includes Fe and Cr.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 5; 1351-1352
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of the RCoSn (R=Tb-Er) and RRhGe (R=Ce, Nd) Compounds
    Autorzy:
    Bażela, W.
    Leciejewicz, J.
    Małetka, K.
    Szytuła, A.
    Zygmunt, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1931331.pdf
    Data publikacji:
    1994-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.25.+z
    Opis:
    Magnetic properties of orthorhombic RCoSn (R = Tb-Er) and RRhGe (R = Ce,Nd) (of the TiNiSi-type of crystal structure), were studied by magnetometric and neutron diffraction methods. All RTX compounds order antiferromagnetically at low temperatures. The magnetic structure of TbCoSn and HoCoSn is sine-wave-modulated with the wave vectors k$\text{}_{1}$ = (0, 0.25, 0.11) and k$\text{}_{2}$ = (0, 0.333, 0), respectively. The magnetic structures of CeRhGe and NdRhGe compounds are collinear (C mode). Magnetic moments of 1.4(2) and 2.0(2) μ$\text{}_{B}$ localized respectively on Ce and Nd ions, are aligned along the a-axis.
    Źródło:
    Acta Physica Polonica A; 1994, 85, 5; 859-862
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electrical and Optical Properties of Highly Non-stoichiometric GaAs
    Autorzy:
    Kurpiewski, A.
    Korona, K.
    Kamińska, M.
    Palczewska, M.
    Jagadish, C.
    Williams, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1876991.pdf
    Data publikacji:
    1995-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.90.+f
    78.30.Er
    Opis:
    The studies of transport and optical properties of GaAs implanted with high arsenic doses were performed. As-implanted samples showed hopping conductivity and the exponential absorption tail in the near-IR region. Both effects were probably caused by the amorphization of implanted layer. Using EPR measurements it was found that arsenic antisite defect with high local strain field was created during implantation. Annealing of implanted layers at 600°C led to substantial removal of amorphization, decrease in absorption coefficient and hopping conductivity leading to resistive samples. The possible model of such behaviour may be similar to the one of suggested for low temperature GaAs layers.
    Źródło:
    Acta Physica Polonica A; 1995, 87, 2; 518-522
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study of Importance of Solar Calculations for "Two Colored Rainbow System" in Istanbul
    Autorzy:
    Er, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402524.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    96.60.Ub
    96.60.Q
    89.60.-k
    89.30.Cc
    Opis:
    The sun radiation is the largest renewable energy source on the planet which can be used in technology by means of thermal, photovoltaic and concentrated solar power systems. In this study, two types of solar collectors, called the "Two Colored Rainbow System", were used as a source for water heating at the Faculty of Science and Letters, at Istanbul Technical University. The performance of solar water heating system was experimentally investigated. In the experimental study, the temperature of hot water storage tank versus time of the day was investigated. The average daily solar radiation at a location is often sufficient for a basic system analysis. The radiation of sun varies according to the location, date, time and conditions of climate. The change of sun radiation was computed using a determined set of parameters. This study was aimed to offer optimization of design parameters taking into account possible interferences during the operation of the system. Additionally, hourly solar radiation on tilted surfaces is measured in Istanbul. Data of solar radiation intensity were also collected using a standard solarimeter (pyrometer) via a data logger.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-477-B-478
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Steady-State and Switch-Off Behavior of Upconversion in Er-Doped Fibers
    Autorzy:
    Khoptyar, D.
    Jaskorzynska, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2035693.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.Eh
    78.20.Bh
    78.55.-m
    42.65.-k
    Opis:
    By measuring the metastable and the upconverted fluorescence in Er-doped fibers we determine rate of homogeneous upconversion as a function of the population inversion. The results confirm the prediction of our statistical model that at the same population inversion the upconversion rates under the steady-state and the switch-off conditions are different. The larger rate of the steady state upconversion is attributed to the pump enhanced redistribution of the excitation energy.
    Źródło:
    Acta Physica Polonica A; 2003, 103, 2-3; 207-210
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phonon Drag and Magnetic Anomalies of Thermopower in $RB_{12}$ (R = Ho, Er, Tm, Lu)
    Autorzy:
    Glushkov, V.
    Demishev, S.
    Ignatov, M.
    Khayrullin, E.
    Sluchanko, N.
    Shitsevalov, N.
    Levchenko, A.
    Filipov, V.
    Flachbart, K.
    Siemensmeyer, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813647.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.15.Jf
    75.50.Ee
    Opis:
    High precision measurements of the Seebeck coefficient S(T) were carried out on the single crystals of $RB_{12}$ (R = Ho, Er, Tm, Lu) at temperatures 2-300 K. It was shown that the effects of phonon drag result from vibrations of rare earth ions ($ħω_E$≈10-33 meV) in the rigid framework structure of the $B_{12}$ clusters and determine the main contribution to thermopower at intermediate temperatures (30-300 K). The correlated behavior of transport parameters favors the appreciable enhancement of spin fluctuations in the sequence of magnetic compounds $(HoB_{12}-TmB_{12})$ when approaching to the valence instability state in $YbB_{12}$. The giant increase in S(T) detected in the vicinity of the Néel temperature $T_N$ for $HoB_{12},$ $ErB_{12},$ and $TmB_{12}$ seems to result from the density of states renormalization caused by antiferromagnetic ordering.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 275-278
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Freon Heat Treatment on Optical properties of Er-Doped Silica-Gel Glasses
    Autorzy:
    Malashkevich, G. E.
    Poddenezhny, E. N.
    Melnichenko, I. M.
    Gaishun, V. E.
    Semchenko, A. V.
    Maruszewski, K.
    Stręk, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1945657.pdf
    Data publikacji:
    1996-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.55.Hx
    Opis:
    Theeffect of freon heat treatment on optical properties of Er-doped silica glasses obtained by the sol-gel method was investigated. It was found that fluorine ions in the process of hydrolysis replace hydroxyl ions in the host and form the complexes with Er$\text{}^{3+}$ ions. It leads to a significant improvement of optical properties of Er doped silica glass.
    Źródło:
    Acta Physica Polonica A; 1996, 90, 2; 419-421
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilization of Ir Laser Pumped Anti-Stokes Emission of Er-Yb Doped Systems for Identification of Securities
    Autorzy:
    Kuzmin, A. N.
    Ryabtsev, G. I.
    Ketko, G. A.
    Gorelenko, A. Ya.
    Demidovich, A. A.
    Stręk, W.
    Maruszewicz, K.
    Dereń, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1945658.pdf
    Data publikacji:
    1996-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.55.Hx
    Opis:
    In this paper we present a utilization of anti-Stokes luminescence of Er-Yb systems for identifications of securities. A simple method of detection of an up-conversion phenomenon in such system by means of IR laser operating in the region 960-1010 nm is proposed.
    Źródło:
    Acta Physica Polonica A; 1996, 90, 2; 423-426
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Role of Arsenic Antisite Defect in Nonstoichiometric Gallium Arsenide
    Autorzy:
    Jasiński, J.
    Kurpiewski, A.
    Korοna, K.
    Kamińska, M.
    Ρalczewska, M.
    Krotkus, A.
    Marcinkievicius, S.
    Liliental-Weber, Z.
    Tan, H. H.
    Jagadish, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1933772.pdf
    Data publikacji:
    1995-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.30.Er
    73.90.+f
    Opis:
    Over the last few years there have been many studies of GaAs layers grown at low temperatures (180-300°C), so called LT GaAs. The interest in LT GaAs was motivated by the potential application of 600oC annealed LT GaAs in microwave and fast optoelectronic devices because of its short photocarrier lifetime, reasonable mobility and high resistivity. These properties are associated with the nonstoichiometry of LT GaAs. Recently, studies of comparable material, nonstoichiometric GaAs produced by arsenic ion implantation have been initiated. There is still a strong controversy as to whether the arsenic antisite (As$\text{}_{Ga}$) or arsenic precipitates are responsible for unique electrical properties of both materials. This paper presents the results of structural and electrical studies of high energy As implanted GaAs and comments on relationships between the structure and the resulting electrical properties.
    Źródło:
    Acta Physica Polonica A; 1995, 88, 4; 747-750
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optically Active Si:Er Layers Grown by the Sublimation MBE Method
    Autorzy:
    Stepikhova, M.
    Andreev, A.
    Andreev, B.
    Krasil'nik, Z.
    Shmagin, V.
    Kuznetsov, V.
    Rubtsova, R.
    Jantsch, W.
    Ellmer, H.
    Palmetshofer, L.
    Preier, H.
    Karpov, Yu.
    Piplits, K.
    Hutter, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1992203.pdf
    Data publikacji:
    1998-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.15.Hi
    Opis:
    We report the first application of sublimation molecular beam epitaxy to grow uniformly and selectively doped Si:Er layers with Er concentration up to 5×10$\text{}^{18}$ cm$\text{}^{-3}$. The Hall concentration of electrons is about 10% of total Er contents. The mobility is 300-400 cm$\text{}^{2}$ V$\text{}^{-1}$ s$\text{}^{-1}$ at 300 K. All samples exhibit photoluminescence at 1.537 μm up to 100-140 K.
    Źródło:
    Acta Physica Polonica A; 1998, 94, 3; 549-554
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Carbon on Spin Reorientation Processes in $Er_{2-x}R_xFe_{14}C$ (R~=~Gd, Pr) - Mössbauer and Magnetometric Studies
    Autorzy:
    Pędziwiatr, A.
    Krawiec, K.
    Bogacz, B.
    Kapusta, Cz.
    Przewoźnik, J.
    Kaczorowski, D.
    Talik, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506592.pdf
    Data publikacji:
    2011-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.80.+y
    75.25.-j
    75.50.-y
    75.50.Bb
    Opis:
    The $Er_{2-x}R_{x}Fe_{14}C$ (R=Gd, Pr) polycrystalline compounds have been synthesized and investigated with $\text{}^{57}Fe$ Mössbauer spectroscopy and magnetic measurements. The spin reorientation phenomena were studied extensively by narrow step temperature scanning in the neighborhood of the spin reorientation temperature. Obtained Mössbauer spectra were analyzed using a procedure of simultaneous fitting and the transmission integral approach. Consistent description of Mössbauer spectra were obtained, temperature and composition dependencies of hyperfine interaction parameters and subspectra contributions were derived from fits and the transition temperatures were determined for all the compounds studied. Initial magnetization versus temperature measurements (in zero and non-zero external field) for $Er_{2-x}Gd_{x}Fe_{14}C$ compounds allowed to establish the temperature regions of reorientation, change of magnetization value during the transition process. The results obtained with different methods were analyzed and the spin arrangement diagrams were constructed. Data obtained for $Er_{2-x}Gd_{x}Fe_{14}C$ were compared with those for $Er_{2-x}Gd_{x}Fe_{14}B$ series.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 1; 48-51
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    UV and Gamma Irradiation Effect in Spectroscopic and Lasing Properties of Er$\text{}^{3+}$ doped Yttrium-Aluminium Garnet, Yttrium Orthoaluminate and Lithium Niobate Crystals
    Autorzy:
    Kaczmarek, S.
    Pracka, I.
    Mierczyk, Z.
    Kopczyński, K.
    Piramidowicz, R.
    Malinowski, M.
    Kisielewski, J.
    Matkovskii, A.
    Sugak, D. Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/1945656.pdf
    Data publikacji:
    1996-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.70.Hj
    61.72.Ji
    78.20.Dj
    Opis:
    Optical features (absorption and luminescence spectra) for Er$\text{}^{3+}$ doped yttrium-aluminium garnet (YAG), yttrium orthoaluminate (YAP) and LiNbO3 crystals as well as their changes after UV and gamma irradiations are presented. Possibility of gamma-induced sensibilization process in Er$\text{}^{3+}$ doped crystals is discussed. Positive result for non-pre-annealed gamma-irradiated rods of Er$\text{}^{3+}$:YAG crystal was stated.
    Źródło:
    Acta Physica Polonica A; 1996, 90, 2; 411-418
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Time Calibration of the J-PET Detector
    Autorzy:
    Skurzok, M.
    Silarski, M.
    Alfs, D.
    Białas, P.
    Shivani, S.
    Curceanu, C.
    Czerwiński, E.
    Dulski, K.
    Gajos, A.
    Głowacz, B.
    Gorgol, M.
    Hiesmayr, B.
    Jasińska, B.
    Kisielewska-Kamińska, D.
    Korcyl, G.
    Kowalski, P.
    Kozik, T.
    Krawczyk, N.
    Krzemień, W.
    Kubicz, E.
    Mohammed, Muhsin
    Pawlik-Niedźwiecka, M.
    Niedźwiecki, S.
    Pałka, M.
    Raczyński, L.
    Raj, J.
    Rudy, Z.
    Sharma, N.
    Sharma, S.
    Shopa, R.
    Wieczorek, A.
    Wiślicki, W.
    Zgardzińska, B.
    Zieliński, M.
    Moskal, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033283.pdf
    Data publikacji:
    2017-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    06.20.fb
    36.10.Dr
    11.30.Er
    24.80.+y
    Opis:
    The Jagiellonian positron emission tomograph project carried out in the Institute of Physics of the Jagiellonian University is focused on construction and tests of the first prototype of PET scanner for medical diagnostic which allows for the simultaneous 3D imaging of the whole human body using organic scintillators. The J-PET prototype consists of 192 scintillator strips forming three cylindrical layers which are optimized for the detection of photons from the electron-positron annihilation with high time-and high angular resolutions. In this article we present time calibration and synchronization of the whole J-PET detection system by irradiating each single detection module with a ²²Na source and a small detector providing common reference time for synchronization of all the modules.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 5; 1641-1644
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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