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Wyświetlanie 1-15 z 44
Tytuł:
Electric Polarization of Onsager Fluids. I. Dipole Polarization. 3. The Role of Universal Pairwise Interactions
Autorzy:
Prezhdo, V. V.
Tarasova, G. V.
Prezhdo, O. V.
Τyurin, S. A.
Ivanov, N. I.
Kurskaya, T. N.
Powiązania:
https://bibliotekanauki.pl/articles/1933603.pdf
Data publikacji:
1995-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
35.20.My
31.70.Dk
Opis:
A comparative study of the methods of interpretation of solvent influences on electric properties of molecules was conducted based on experimental dielectric properties of dilute solutions of organic substances of various polarity. It was shown that the solvent effect estimated via London-Debye-Keesom pairwise interaction potentials is best accounted for by theories of polarization of condense media which develop the anzatzes of reactive field and local dielectric permittivity.
Źródło:
Acta Physica Polonica A; 1995, 88, 3; 419-434
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electric Polarization of Onsager Fluids. II. Birefringence. 3. Role of Universal Pairwise Interactions
Autorzy:
Prezhdo, V. V.
Tarasova, G. V.
Prezhdo, O. V.
Tyurin, S. A.
Akulova, O. N.
Ivanov, N. I.
Powiązania:
https://bibliotekanauki.pl/articles/1943971.pdf
Data publikacji:
1996-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
31.70.Dk
78.20.Fm
72.80.Jc
Opis:
A comparative analysis of several methods of interpretation of solvent influence on molar Kerr constants of solutes was done. The analysis was based on experimentally determined electro-optical and dielectric properties of binary solutions of organic substances with various polarities, polarizabilities and optical anisotropies. It was found that the role of universal van-der-Waals interactions treated via London-Debye-Keesom potentials was best accounted for by a modified orientational theory of Kerr effect that developed the ansatz of reactive field and local dielectric permittivity. An extrapolation method of determination of gas phase molar Kerr constants of solutes was deduced from the theory.
Źródło:
Acta Physica Polonica A; 1996, 89, 1; 47-59
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CdSe Layers of Below Critical Thickness in ZnSe Matrix: Intrinsic Morphology and Defect Formation
Autorzy:
Sedova, I.
Shubina, T.
Sorokin, S.
Sitnikova, A.
Toropov, A.
Ivanov, S.
Willander, M.
Powiązania:
https://bibliotekanauki.pl/articles/1992185.pdf
Data publikacji:
1998-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.45.+h
Opis:
Three main stages of the intrinsic morphology transformation of MBE grown CdSe fractional monolayers in ZnSe with increase in their nominal thickness w in the 0.1-3.0 monolayer range were found using both structural and optical characterization techniques. Emergence of the extended (15-30 nm) CdSe-enriched quantum-dot-like pseudomorphic islands at w>0.7 monolayer with the density increasing up to 2.5×10$\text{}^{10}$ cm$\text{}^{-2}$ at w=2.8 monolayer is clearly displayed in the optical properties of CdSe fractional monolayer nanostructures. The below critical thickness CdSe fractional monolayers having extremely high quantum efficiency can be very perspective as an active region of ZnSe-based blue-green lasers.
Źródło:
Acta Physica Polonica A; 1998, 94, 3; 519-525
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optically Pumped Low Threshold ZnSe Based Lasers with 2.8 ML CdSe Active Region
Autorzy:
Sorokin, S.
Toropov, A.
Shubina, T.
Lebedev, A.
Sedova, I.
Ivanov, S.
Waag, A.
Powiązania:
https://bibliotekanauki.pl/articles/1992195.pdf
Data publikacji:
1998-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.66.Hf
78.45.+h
Opis:
Room-temperature optically pumped (Zn,Mg)(S,Se)/(Zn,Cd)Se laser structures have been grown by molecular beam epitaxy. Using of alternatively-strained short-period superlattice waveguide results in low threshold power density values over the whole blue-green (470-520 nm) wavelength range. Incorporation of CdSe fractional monolayer active region provides more than fourfold further decrease in threshold with respect to quantum well laser structure. Optical and structural properties of laser structure with 2.8 monolayer CdSe are discussed in detail.
Źródło:
Acta Physica Polonica A; 1998, 94, 3; 539-544
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Straty lotnictwa NATO w wojnie na Bałkanach
Autorzy:
Ivanov, I.
Powiązania:
Wybrane Informacje Tematyczne / Centralny Ośrodek Naukowej Informacji Wojskowej 1999, nr 3, s. 16-23
Współwytwórcy:
Ryś, Ryszard. Opracowanie
Data publikacji:
1999
Tematy:
NATO operacje powietrzne Jugosławia 1999 r.
Lotnictwo wojskowe straty wojenne NATO Jugosławia 1998 r.
Interwencja zbrojna NATO Jugosławia 1999 r.
Opis:
Tł. art. zamieszcz. w: "Zarubežnoe Voennoe Obozrenie". --- 1999, nr 6, s. 12-14.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Straty lotnictwa NATO w wojnie na Bałkanach
Autorzy:
Ivanov, I.
Powiązania:
Wybrane Informacje Tematyczne Centralny Ośrodek Naukowej Informacji Wojskowej, 1999, nr 3, s. 16-23
Współwytwórcy:
Ryś, Ryszard. Opracowanie
Data publikacji:
1999
Tematy:
Lotnictwo wojskowe straty wojenne NATO Jugosławia 1998 r.
Interwencja zbrojna 1999 r. w Jugosławii
Operacje powietrzne NATO Jugosławia
Opis:
Tł. art. zamieszcz. w: "Zarubežnoe Voennoe Obozrenie". --- 1999, nr 6, s. 12-14.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Magnetoelastic Anomalies and Suppression of Jahn-Teller Distortions in La$\text{}_{1-x}$Sr$\text{}_{x}$MnO$\text{}_{3}$ by Pulsed Magnetic Fields
Autorzy:
Kadomtseva, A. M.
Popov, Yu. F.
Vorob'ev, G. P.
Kamilov, K. I.
Ivanov, V. Yu.
Mukhin, A. A.
Balbashov, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/2013240.pdf
Data publikacji:
2000-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Kz
75.50.Pp
Opis:
Thermal expansion Δl/l(T) and magnetostriction λ$\text{}_{∥, ⊥ }$(H,T) in the pulsed magnetic fields H up to 250 kOe were studied in the single La$\text{}_{1-x}$Sr$\text{}_{x}$MnO$\text{}_{3}$ crystals (x=0.1, 0 .125, and 0.15) at temperatures T=10-320 K. Anomalies in the Δl/l (T) curves were observed near a charge (polaron) ordering (T$\text{}_{p}$) and structural transitions between orthorhombic Jahn-Teller distorted O' phase and high temperature orthorhombic (pseudocubic) O$\text{}^{*}$ one (T'$\text{}_{s}$). A noticeable increase in the field-induced magnetostriction λ$\text{}_{∥, ⊥ }$(H) was revealed in the O' phase at T$\text{}_{p}$
Źródło:
Acta Physica Polonica A; 2000, 97, 3; 599-602
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cd(Mg)Se Single Layers and CdSe/CdMgSe Heterostructures Grown by Molecular Beam Epitaxy on InAs(001) Substrates
Autorzy:
Kaygorodov, V. A.
Sorokin, V. S.
Sedova, I. V.
Nekrutkina, O. V.
Sorokin, S. V.
Shubina, T. V.
Toropov, A. A.
Ivanov, S. V.
Powiązania:
https://bibliotekanauki.pl/articles/2028799.pdf
Data publikacji:
2001-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.66.Hf
Opis:
We report on molecular beam epitaxy of CdSe/CdMgSe heterostructures on InAs(001) substrates and studies of their optical and structural properties. The CdMgSe energy gap versus composition dependence is determined. The zinc-blende MgSe band-gap energy and optical bowing parameter are estimated to be 4.05 eV and 0.2 eV, respectively. The CdSe quantum wells embedded into CdMgSe barriers demonstrate intense photoluminescence. Effective mass approximation calculations of electron-heavy hole optical transitions in CdSe quantum well are in a good agreement with the experimental data obtained.
Źródło:
Acta Physica Polonica A; 2001, 100, 3; 443-450
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental study of a powerful energy flow effect on materials in PF-1000 installation
Autorzy:
Borowiecki, M.
De Chiara, P.
Dubrovsky, A. V.
Dyomina, E. V.
Gribkov, V. A.
Ivanov, L. I.
Maslyaev, S. A.
Mezzetti, F.
Miklaszewski, R.
Pimenov, V. N.
Pizzo, L.
Scholz, M.
Szydlowski, A.
Ugaste, Y. E.
Volobuev, I. V.
Powiązania:
https://bibliotekanauki.pl/articles/148824.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
dense plasma focus (DPF)
irradiation
plasma jet
shock wave
test specimen
Opis:
The report describes some of the results obtained in an experimental study of the impact of a powerful plasma stream and a fast ion beam generated in a PF-1000 device on different materials perspective for the use in radiation loaded parts of pulsed plasma installations. Investigations were done during and after the interaction processes. It is shown that in case of irradiation of samples only by high power flux density plasma streams the effect of detachment still preserved. At the same time a low power flux density high-energy ion beam plays an important role in the process of saturation of the irradiated material by hydrogen.
Źródło:
Nukleonika; 2001, 46, suppl. 1; 117-122
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the pulse plasma stream
Autorzy:
Evtikhin, V. A.
Lyublinsky, I. E.
Vertkov, A. V.
Ivanov, L. I.
Ivanov, Y. P.
Krokhin, O. N.
Nikulin, V. Y.
Polukhin, S. N.
Safronova, T. V.
Tikhomirov, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/148327.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
interaction of plasma with matter
lithium capillary porous system
plasma dynamics
plasma focus
thermonuclear reactor
Opis:
In this report we present a first series of tests of the lithium Capillary Porous System (CPS). We suppose that such a system can be used as a first wall in a thermonuclear reactor. The main goal of the presented work was to study the behavior of the lithium CPS in the condition simulating the influence of plasma in various operating regimes of the thermonuclear reactor. The tests were conducted in a Plasma Focus (PF) installation. The preliminary analysis of the received results confirms the high resistance of the lithium CPS to the pulse influence of plasma flows.
Źródło:
Nukleonika; 2001, 46, suppl. 1; 113-115
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plasma Focus as a lens for intense ion beam focusing
Autorzy:
Belan, V. N..
Butenko, V. I.
Ivanov, B. I.
Kiseleva, V. A.
Kitsenko, A. B.
Linnik, A. F.
Maslov, V. I.
Onishchenko, I. N.
Prishchepov, V. P.
Yegorov, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/147316.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
intense MeV proton beam accelerator
plasma focus
plasma lens
Opis:
Experimental investigations were performed to evaluate the focusing properties of the plasma focus for high-energy intense ion beams manipulating. Magnetic probes and optical spectroscopy were used for temporal and spatial plasma geometry investigations. Ion beam portrait was determined at the luminescence screen. In the experiments performed, the focusing coefficient was obtained as the ten times beam compression at the 30 cm length. By variations of the gas volume input, gun voltage, time delay, magnetic field value etc. the dependence of focused ion beam diameter upon various parameters of the plasma focus lens has been investigated. It was revealed that the main focusing effect was caused by the azimuthal magnetic field of the currents carried by the plasma.
Źródło:
Nukleonika; 2001, 46, suppl. 1; 35-36
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of powerful pulses of hydrogen plasma upon materials in PF-1000 device
Autorzy:
Pimenov, V.
Gribkov, V.
Dubrovsky, A.
Mezzetti, F.
Scholz, M.
Ugaste, U.
Dyomina, E.
Ivanov, L.
Maslyaev, S.
Miklaszewski, R.
Borowiecki, M.
De Chiara, P.
Pizzo, L.
Szydlowski, A.
Volobuev, I. V.
Powiązania:
https://bibliotekanauki.pl/articles/147096.pdf
Data publikacji:
2002
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
dense plasma focus (DPF)
ion beam
irradiation
plasma jet
surface damage
test specimen
Opis:
The results of experimental investigations of powerful hydrogen plasma jets and fast ion beams interaction with various materials (austenitic chromium-manganese steels, pure vanadium, tungsten, graphite, copper, and their alloys: Cu-4 mass% Ni and Cu-10 mass% Ga) are presented. The materials were placed on the discharge axis of the PF-1000 device and irradiated with fluxes of fast ions (of energy in the range from tens keV up to several MeV) and with plasma streams (of power flux density q~(108 109) W/cm2). It was found that the fast ions and plasma streams caused different damages to the aforementioned materials. A diverse character of the damages to the individual investigated material was revealed. Some peculiarities of the process as well as the correlation between the surface density of the "macroscopic" structural defects (blisters and craters) and the fluence of the fast ions implanted in the specimen are discussed.
Źródło:
Nukleonika; 2002, 47, 4; 155-162
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cathodoluminescence Profiling of InGaN-Based Quantum Well Structures and Laser Diodes - In-Plane Instabilities of Light Emission
Autorzy:
Godlewski, M.
Ivanov, V. Yu.
Goldys, E. M.
Phillips, M.
Böttcher, T.
Figge, S.
Hommel, D.
Czernecki, R.
Prystawko, P.
Leszczynski, M.
Perlin, P.
Grzegory, I.
Porowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/2036870.pdf
Data publikacji:
2003-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.72.Ff
61.72.Mm
68.37.Hk
78.60.Hk
Opis:
Instabilities of light emission and also of stimulated emission in series of GaN epilayers and InGaN quantum well structures, including laser diode structures, are studied. A stimulated emission is observed under electron beam pumping. This enabled us to study light emission properties from laser structures and their relation to microstructure details. We demonstrate large in-plane fluctuations of light emission and that these fluctuations are also present for excitation densities larger than the threshold densities for the stimulated emission.
Źródło:
Acta Physica Polonica A; 2003, 103, 6; 689-694
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the nature of changes in the optical characterization produced in sapphire on its irradiation with a pulsed powerful stream of hydrogen ions
Autorzy:
Gribkov, V.
Ivanov, L.
Maslyaev, S.
Pimenov, V.
Sadowski, M.
Skladnik-Sadowska, E.
Banaszak, A.
Kopeć, G.
Cheblukov, Y.
Kozodaev, M. A.
Suvorov, A. L.
Smirnov, I. S.
Powiązania:
https://bibliotekanauki.pl/articles/147991.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
optical characteristics
irradiation
fast ion stream
morphology
Opis:
Changes in the optical characteristics in synthetic sapphire specimens produced by microsecond pulse irradiation with a stream of hydrogen ions of energies ranging up to tens keV have been observed. Data on decrease in the optical reflection, measured within the wavelength range of 200 900 nm, are presented. This characterization is compared with the data received by optical and atomic force microscopy as well as by lattice structure analysis performed with X-rays. The measurements indicate that the changes of optical parameters are not a consequence of absorption increase and/or sapphire decomposition. They result from modifications of the morphology and structure of surface layer of the sapphire samples, induced by irradiation.
Źródło:
Nukleonika; 2004, 49, 2; 43-49
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Combined (ZnSe/MgS)/ZnCdSe Bragg Reflectors Grown Using ZnS as a Sulphur Source
Autorzy:
Solnyshkov, D. D.
Sorokin, S. V.
Sedova, I. V.
Toropov, A. A.
Ivanov, S. V.
Powiązania:
https://bibliotekanauki.pl/articles/2044540.pdf
Data publikacji:
2005-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.40.Fy
Opis:
We report on MBE growth and study of optical and structural properties of (ZnSe/MgS)/ZnCdSe distributed Bragg reflectors with λ=520 nm and R$\text{}_{max}$=97%. The samples were grown pseudomorphically on GaAs substrate using ZnS as a sulphur source. Scanning electron microscopy, X-ray diffraction, and optical measurements showed good optical and structural characteristics of the Bragg reflectors.
Źródło:
Acta Physica Polonica A; 2005, 108, 5; 873-877
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 44

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