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31.
A. G. Gavriliuk I. A. Troyan A. G. Ivanova S. N. Aksenov S. S. Starchikov I. S. Lyubutin W. Morgenroth K. V. Glazyrin M. Mezouar 《JETP Letters》2017,105(11):733-738
The quantum heat generation, interaction force, and friction torque for two rotating spherical nanoparticles with the radius R are calculated. In contrast to a static case where an upper bound in the radiative heat transfer between two particles exists, the quantum heat generation for two rotating particles diverges at distances between particles d < d 0 = R(3/ε″(ω0))1/3 (where ε″(ω0) is the imaginary part of the dielectric function for the material of a particle at the resonance frequency ω0), when the rotation frequency coincides with poles in the excitation generation rate at Ω = 2ω0. These poles are due to the anomalous Doppler effect and the mutual polarization of particles and exist even in the presence of dissipation in particles. The anomalous heat generation is associated with the conversion of mechanical rotation energy into heat mediated by quantum friction. Similar singularities also exist for the interaction force and friction torque. The results can be of significant importance for biomedical applications. 相似文献
32.
A. G. Ivanova I. A. Troyan D. A. Chareev A. G. Gavriliuk K. V. Frolov S. S. Starchikov A. O. Baskakov M. Mezouar I. S. Lyubutin 《JETP Letters》2017,106(10):662-666
Synchrotron X-ray diffraction studies of the structure of SnTe have been performed at room temperature and high pressures under the conditions of quasihydrostatic compression up to 193.5 GPa created in diamond anvil cells. Two structural phase transitions have been detected at P ≈ 3 and 23 GPa. The first phase transition is accompanied by a stepwise decrease in the volume of the unit cell by 4% because of the orthorhombic distortion of the initial SnTe-B1 cubic structure of the NaCl type. It has been found that two intermediate rhombic phases of SnTe with the space groups Cmcm and Pnma coexist in the pressure range of 3–23 GPa. The second phase transition at 23 GPa occurs from the intermediate rhombic modification to the SnTe-B2 cubic phase with the CsCl structure type. This phase transition is accompanied by an abrupt decrease in the volume of the unit cell by 8%. The pressure dependence of the volumes per formula unit at room temperature has been determined. 相似文献
33.
B. I. Ermolaev M. Greco S. I. Troyan 《The European Physical Journal C - Particles and Fields》2012,72(3):1-12
We calculate the branching ratios and CP asymmetries of the B???Ц?, ?Ц? decays in the perturbative QCD factorization approach up to the next-to-leading-order contributions. We find that the next-to-leading-order contributions can interfere with the leading-order part constructively or destructively for different decay modes. Our numerical results have a much better agreement with current available data than previous leading-order calculations, e.g., the next-to-leading-order corrections enhance the B 0???? 0 ?? 0 branching ratios by a factor 2.5, which is helpful to narrow the gaps between theoretic predictions and experimental data. We also update the direct CP-violation parameters, the mixing-induced CP-violation parameters of these modes, which show a better agreement with experimental data than many of the other approaches. 相似文献
34.
In the present paper, the finite-difference method is used for the solution of the direct problem, which enables us to take
into account the diffraction phenomenon on local inhomogeneities of not weak contrast. Examples that allow us to estimate
the precision of restoration of the parameters of such inhomogeneities, depending on the degree of their contrast, are given.
The possibility of restoring the parameters of a local inhomogeneity in a medium containing interfaces with stepwise change
of elastic properties for the case where source and receiver points are located on the free surface is demonstrated. An example
of the numerical estimation of the precision of calculation of a scattered field in the Born approximation, approximating
the wave field by the zero term of the ray method, is offered. Bibliography: 11 titles.
Translated fromZapiski Nauchnykh Seminarov POMI, Vol. 250, 1998, pp. 136–152.
Translated by Yu. V. Kiselev 相似文献
35.
L. Rosenthaler P. Krumholz J. Vasquez Sanchez F. Feigl A. S. Komarowsky N. S. Poluektoff J. V. Dubský J. Trtilek A. Oká G. Hellsing K. Heumann F. Emich Olga S. Fedorova Georges Glomaud J. Trtílek VI. Stanék T. Nemes Carl Urbach R. Baril und J. H. Yoe 《Fresenius' Journal of Analytical Chemistry》1935,102(7-8):280-289
Ohne Zusammenfassung 相似文献
36.
VI. Nevoral 《Analytical and bioanalytical chemistry》1974,268(3):189-193
In the described analysis of mineral waters, after the throughflow of the sample through a column with Dowex 50 WX 12 in H+ form, the main cations are first eluted by 1.6 N HCl and then the rare earths by 6 N HCl. The latter are separated by ion-exchange chromatography on Dowex 50WX8 in NH4 + form, the elution being performed with ammonium citrate pH 4.19. The presence of rare earths in the eluate was ascertained spectrophotometrically by means of their reaction with xylenol orange in the presence of cetylpyridinium bromide. In mineral waters from the West-Bohemian spa region it was possible to find traces of trivalent La, Ce, Pr, Nd, Sm + Gd, Y, Dy, Ho, Er, Tm, Yb and Lu. 相似文献
37.
Zhidik Yu. S. Troyan P. E. Kozik V. V. Kozyukhin S. A. Zabolotskaya A. V. Kuznetsova S. A. 《Russian Physics Journal》2020,63(7):1139-1143
Russian Physics Journal - The results of a study of the electrophysical characteristics of ITO films obtained by magnetron sputtering are presented. It is shown that a significant increase in the... 相似文献
38.
Gavriliuk A. G. Struzhkin V. V. Aksenov S. N. Ivanova A. G. Mironovich A. A. Troyan I. A. Lyubutin I. S. 《JETP Letters》2022,116(11):804-816
JETP Letters - Iron polyhydrides have been synthesized at pressures of 77–157 GPa and temperatures up to 2000 K by the laser heating of an iron–borazane (ammonia borane NH3BH3) sample... 相似文献
39.
The spin states of Fe2+ ions in (Mg0.75,Fe0.25)O magnesiowüstite crystals at hydrostatic pressures up to 90 GPa created in a diamond-anvil cell with helium as a pressure-transmitting medium have been investi-gated by transmission and synchrotron Mössbauer spectroscopy at room temperature. An electron transition from the high-spin (HS) state to the low-spin (LS) state (HS-LS crossover) has been observed in the pressure range of 55–70 GPa. The true HS-LS transition occurs in a narrow pressure range and the extension of the electron transition to ~15 GPa is attributed to the effect of the nearest environment and to thermal fluctuations between the high-spin and low-spin states at finite temperatures. It has been found that the lowest pressure at which the electron HS-LS transition can occur in the Mg1 ? x Fe x system is 50–55 GPa. 相似文献
40.
Breakdown delay times (tdel) for films of managanese-doped zinc sulfide (ZnS:Mn) were measured in the range 10–6–10–1 s. The maximum value was tdel=10–3–10–2 s. The electrical strength (Ebr) was found to increase as the voltage pulse duration was reduced, the more so the thinner the ZnS:Mn film. The temperature dependence of Ebr exhibited a weak reduction in Ebr as the temperature was raised to roughly 80°C and a sharp reduction in Ebr for T>130°C. A maximum in Ebr was observed at T130°C which is presumably explained by a structural modification of the ZnS:Mn film. The experimental results obtained are explained in terms of a combined electronic and thermal breakdown mechanism.State Academy of Control Systems and Radioelectronics, Tomsk. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 4, pp. 3–6, April, 1994. 相似文献