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Acoustical Physics - The problem of pulsed excitation of an acoustic waveguide with a constant cross section is considered. Absorption is ignored. As the most general model of such a waveguide,... 相似文献
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Vorobyeva S. N. Baidina I. A. Sukhikh T. S. Korolkov I. V. Belyaev A. V. 《Journal of Structural Chemistry》2022,63(4):569-579
Journal of Structural Chemistry - Rhodium nitromonoethylenediamine complexes with compositions K[Rh(en)(NO2)4] (I), (Me4N)[Rh(en)(NO2)4]·2H2O (II), [Rh(en)(H2O)(NO2)3]·H2O (III),... 相似文献
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S. A. Akimenko V. N. Bolotov G. I. Britvich K. V. Datsko V. A. Duk A. P. Filin E. N. Gushchin A. V. Inyakin V. A. Khmelnikov A. S. Konstantinov V. F. Konstantinov I. Yu. Korolkov S. V. Laptev V. A. Lebedev V. M. Leontiev A. E. Mazurov V. P. Novikov V. F. Obraztsov V. A. Polyakov A. Yu. Polyarush V. E. Postoev V. I. Romanovsky V. I. Shelikhov O. G. Tchikilev V. A. Uvarov O. P. Yushchenko 《Physics of Atomic Nuclei》2007,70(4):702-708
Results of study of the $K^ - \to \pi ^0 e^ - \overline \nu \gamma $ decay at the ISTRA+ setup are presented. We observed 4476 events of this decay. The branching ratio is found to be $R = \frac{{Br(K^ - \to \pi ^0 e^ - \overline \nu _e \gamma )}}{{Br(K^ - \to \pi ^0 e^ - \overline \nu _e )}}$ = (1.81±0.03(stat.)±0.07(syst.)) × 10?2 for E*γ > 10 MeV and θ*eγ > 10°. For comparison with the previous experiment the branching ratio with cuts E*γ > 10 MeV, 0.6 < cos θ*eγ < 0.9 is calculated: R = $\frac{{Br(K^ - \to \pi ^0 e^ - \overline \nu _e \gamma )}}{{Br(K^ - \to \pi ^0 e^ - \overline \nu _e )}}$ = (0.47±0.02(stat.) ± 0.03(syst.)) × 10?2. For the cuts E*γ > 30 MeV and θ*eγ > 20°, used in most theoretical papers, Br = (3.06 ± 0.09(stat.) ± 0.14(syst.)) × 10?4. For the asymmetry we get A ξ = ?0.015 ± 0.021. At present it is the best estimate of this asymmetry. 相似文献
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Makotchenko E. V. Baidina I. A. Korolkov I. V. 《Journal of Structural Chemistry》2021,62(8):1270-1278
Journal of Structural Chemistry - Double complex salts [Au(Dien)Cl][PtCl4]·H2O (1) and [Au2(Dien*)Cl4]2[PtCl6]·2H2O (2), where Dien* is diethylenetriamine with a deprotonated imino group,... 相似文献
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S. P. Khranenko N. V. Kuratieva I. V. Korolkov S. A. Gromilov 《Journal of Structural Chemistry》2016,57(3):625-627
The structure of [Pb3(OH)4Co(NO2)3](NO3)(NO2)·2H2O is determined by single crystal X-ray diffraction. The crystallographic characteristics are as follows: a = 8.9414(4) Å, b = 14.5330(5) Å, c = 24.9383(9) Å, V = 3240.6(2) Å3, space group Pbca, Z = 8. The Co(III) atoms have a slightly distorted octahedral coordination formed by three nitrogen atoms belonging to nitro groups (Co–Nav is 1.91 Å) and three oxygen atoms belonging to hydroxyl groups (Co–Oav is 1.93 Å). The hydroxyl groups act as μ3-bridges between the metal atoms. The geometric characteristics are analyzed and the packing motif is determined. 相似文献
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EP Sheretov VS Gurov MV Dubkov OV Korneeva 《Rapid communications in mass spectrometry : RCM》1999,13(16):1699-1702
In this article we compare the classical monopole mass filter of von Zahn and the monopole mass filter with a hyperbolic V-shaped electrode. The experimental results and those of computer simulation for both mass spectrometers are presented. We show that the replacement of a conventional 90 degrees V-shaped electrode by an electrode with a hyperbolic profile substantially improves the peak shape of any given mass, and increases the mass resolution by a factor of 3-4 and the abundance sensitivity by a factor of 100. The potential of high analytical performance combined with electroforming techniques for electrode manufacture indicate future practical uses of such instruments. Copyright 1999 John Wiley & Sons, Ltd. 相似文献
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A study of the phenomenon of diffraction of acoustic waves in application to the task of noise shielding by the method of maximum length sequences has been carried out. Rectangular plates and an aircraft model of integrated layout are used as the screens. In the study of noise shielding by aircraft model, the theorem of reciprocity is used. A comparison of experimental results with calculations performed in the framework of the geometrical theory of diffraction (GTD) is performed. On the basis of calculations, the identification of the contributions from different areas of the shielding surface in the full acoustic field is carried out. For the aircraft model, the shielding factor is calculated depending on the frequency. 相似文献
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Adonin S. A. Bondarenko M. A. Abramov P. A. Korolkov I. V. Plyusnin P. E. Sokolov M. N. Fedin V. P. 《Russian Journal of Coordination Chemistry》2019,45(2):128-132
Russian Journal of Coordination Chemistry - Mononuclear complexes (3-XPyH)[SbBr6] (X = Cl (I), Br (II)) are synthesized by the reactions of Sb2O3, Br2, and 3-XPy in HBr. Compound I is characterized... 相似文献