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81.
We discuss the interaction between point vortices and point dipole vortices in two-dimensional ideal hydrodynamics and show
that the equations of motion of the interacting point and point dipole vortices are exactly integrable. We find exact solutions
for all possible parameter values characterizing the vortices and for arbitrary initial conditions and establish the regimes
of vortex motion. 相似文献
82.
R. N. Gurzhi A. N. Kalinenko A. I. Kopeliovich A. V. Yanovsky 《Journal of Experimental and Theoretical Physics》2007,105(1):149-151
Spin injection from a ferromagnetic metal into a semiconductor driven by a constant phonon flow is considered. It is shown that diffusive (as opposed to electrical) spin injection gives rise to a highly spin-polarized current through the semiconductor. In other words, phonon-wind-driven injection under certain conditions eliminates the conductivity mismatch responsible for reduced spin polarization of the electric current injected from a ferromagnetic metal into a semiconductor. 相似文献
83.
Pisareva IV Dolgushin FM Yanovsky AI Balagurova EV Petrovskii PV Chizhevsky IT 《Inorganic chemistry》2001,40(21):5318-5319
84.
A. Maksimchuk S. Reed N. Naumova V. Chvykov B. Hou G. Kalintchenko T. Matsuoka J. Nees P. Rousseau G. Mourou V. Yanovsky 《Applied physics. B, Lasers and optics》2007,89(2-3):201-207
By focusing 40-TW, 30-fs laser pulses to the peak intensity of 1019 W/cm2 onto a supersonic He gas jet, we generate quasi-monoenergetic electron beams for plasma density in the specific range 1.5×1019 cm-3≤ne≤3.5×1019 cm-3. We show that the energy, charge, divergence and pointing stability of the beam can be controlled by changing ne, and that higher electron energies and more stable beams are produced for lower densities. The observed variations are explained
physically by the interplay among pump depletion and dephasing between accelerated electrons and plasma wave. Two-dimensional
particle-in-cell simulations support the explanation by showing the evolution of the laser pulse in plasma and the specifics
of electron injection and acceleration. An optimized quasi-monoenergetic beam of over 300 MeV and 10 mrad angular divergence
is demonstrated at a plasma density of ne≃1.5×1019 cm-3.
PACS 52.35.-g; 52.38.Hb; 52.38.Kd; 52.65.-y 相似文献
85.
Zweiback J Smith RA Cowan TE Hays G Wharton KB Yanovsky VP Ditmire T 《Physical review letters》2000,84(12):2634-2637
Recent experiments on the interaction of intense, ultrafast laser pulses with large van der Waals bonded clusters have shown that these clusters can explode with substantial kinetic energy. By driving explosions in deuterium clusters with a 35 fs laser pulse, we have accelerated ions to sufficient kinetic energy to produce DD nuclear fusion. By diagnosing the fusion yield through measurements of 2.45 MeV fusion neutrons, we have found that the fusion yield from these exploding clusters varies strongly with the cluster size, consistent with acceleration of deuterons via Coulomb explosion forces. 相似文献
86.
87.
88.
Synthesis and crystal structure of the double barium-titanium methoxide [Ba2Ti4O(OMe)18(MeOH)7]·MeOH
Z. A. Starikova A. I. Yanovsky N. M. Kotova M. I. Yanovskaya N. Ya. Turova D. Benlian 《Polyhedron》1997,16(24):4347-4351
The X-ray diffraction study of crystals isolated from solutions obtained by reaction of Ba(OMe)2 with Ti(OMe)4 (molar ratio 1:2) in methyl alcohol was carried out; the crystals of the methanol solvate of the double barium-titanium methoxide, [Ba2Ti4O(OMe)18(MeOH)7]·MeOH (1), contain two Ba2+ cations with different environments and two kinds of anionic binuclear titanium complexes with and without oxo-ligand, and thus can be formulated as [Ba(MeOH)2]2+[Ba(MeOH)5]2+[Ti2O(OMe)8]2−[Ti2(OMe)10]2−·MeOH. 相似文献
89.
A. M. Sheloumov A. A. Koridze M. G. Ezernitskaya P. V. Petrovskii O. L. Tok Z. A. Starikova F. M. Dolgushin A. I. Yanovsky 《Russian Chemical Bulletin》1999,48(9):1767-1773
Reaction of the cluster Os3(μ-CO)(CO)9(μ3-η1:η1:η2-Me3SiC2Me) with HC≡CCOOMe in benzene at 70 °C results in Os3(CO)9{μ3-η1:η1:η2:η2-C(SiMe3)C(Me)C(COOMe)CH× (5), Os3(CO)9{μ3-η1:η1:η2:η2-C(SiMe3)C(Me)C(H)C(COOMe)CH× (6), Os3(CO)9{μ-η1:η1:η4-C(SiMe3)C(Me)C(H)C(COOMe)CH× (7), and Os3(CO)δ{μ3-η1:η1:η4:η1-C(SiMe3)C(Me)C(H)C(COOMe)× complexes (8), containing an osmacyclopentadiene moiety. Complexes5–8 were characterized by1H NMR and IR spectroscopy. The structure of clusters5 and8 was confirmed by X-ray analysis. Complex7 is formed from cluster5 as a result of a new intramolecular rearrangement and complex8 is obtained by decarbonylation of compound6. Complex8 adds PPh3 to give Os3(CO)δ(PPh3){μ-η1:η1:η4-C(SiMe3)C(Me)C(H)C(COOMe)×. 相似文献
90.
O. A. Kizas A. V. Usatov P. V. Petrovskii M. G. Ezernitskaya F. M. Dolgushin A. I. Yanovsky Yu. N. Novikov A. A. Koridze 《Russian Chemical Bulletin》1998,47(9):1797-1804
The reaction of Os3(μ-Cl)2(CO)10 (1) with Ph2PCH2PPh2 (dppm) in a toluene solution at 65°C results in novel osmium complexes [Os3(μ-Cl)2(CO)9]2(dppm) (2) and [Os3(μ-Cl)2(CO)8]2(dppm)2 (3). Compounds 2 and 3 were characterized by1H and31P NMR, and IR spectroscopy and their structures were established by X-ray analysis. In both compounds, dppm is a bridging
ligand between the two cluster units. Molecule3 can be considered as an unusual 12-membered macrocycle containing C, P, Cl, and Os atoms in the ring.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1844–1851, September, 1998. 相似文献