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81.
M. S. Grigor’eva A. é. Voloshin E. B. Rudneva V. L. Manomenova S. N. Khakhanov V. Ya. Shklover 《Crystallography Reports》2009,54(4):637-644
The K2Co(SO4)2 · 6H2O-K2Ni(SO4)2 · 6H2O system has been studied, and a series of K2Ni(SO4)2 · 6H2O/K2Co(SO4)2 · 6H2O bicrystals have been grown. The processes of defect formation at the substrate/layer interface K2Co(SO4)2 · 6H2O/K2Ni(SO4)2 · 6H2O are studied by probe microanalysis, X-ray topography, and optical microscopy. It is found that inclusions and threading
dislocations are formed at the interface, due to which elastic stresses relax in the crystal. Nickel is nonuniformly distributed
in the layer; its concentration decreases with an increase in the layer thickness, which is indicative of substrate dissolution
in the initial stage of interaction. A way for the elastic mismatch stresses to relax in heterostructures of brittle crystals
obtained from solutions at low temperatures is proposed which implies the formation of inclusions at the substrate/layer interface.
Original Russian Text ? M.S. Grigor’eva, A.é. Voloshin, E.B. Rudneva, V.L. Manomenova, S.N. Khakhanov, V.Ya. Shklover, 2009,
published in Kristallografiya, 2009, Vol. 54, No. 4, pp. 679–687. 相似文献
82.
Astrophysical sources of nuclei are expected to produce a broad spectrum of isotopes, many of which are unstable. An unstable nucleus can beta-decay outside the source into a single-electron ion. Heavy one-electron ions, thus formed, can be excited in their interactions with cosmic microwave background photons, in which case they relax to the ground state with the emission of a gamma ray. Repetitive cycles of excitation and gamma-ray emission can produce an observable feature in the gamma-ray spectrum with a maximum around 8 GeV (for iron). We find that the observed spectrum of Centaurus A is consistent with a substantial flux of nuclei accelerated to 0.1 EeV. A characteristic 5-10 GeV (iron) shoulder in the gamma-ray spectra of various sources can help identify astrophysical accelerators of nuclei or set upper limits on nuclear acceleration. 相似文献
83.
Kramer O. L. Battalov E. M. Voloshin A. I. Prochukhan Yu. A. 《Russian Journal of Applied Chemistry》2001,74(7):1190-1193
Photoinduced recombination chemiluminescence was applied for monitoring of the network structure formation under UV exposure of films prepared by esterification with acrylic acid of oligomers such as UP-612, ED-16, and Oksilin commercial epoxy resins. The chemiluminescence decay was described in terms of the fractal kinetics model. The spectral dimension parameter, apparent luminescence activation energies, and glass transition temperatures of the polymers were calculated. 相似文献
84.
Kaminskii A. A. Manomenova V. L. Rudneva E. B. Sorokina N. I. Grebenev V. V. Kozlova N. N. Angeluts A. A. Ozheredov I. A. Solyankin P. M. Denisyuk I. Yu. Fokina M. I. Zulina N. A. Shkurinov A. P. Voloshin A. E. 《Crystallography Reports》2019,64(4):669-677
Crystallography Reports - Aqueous solutions of guanylurea hydrogen phosphite (GUHP) have been synthesized. The temperature dependence of equilibrium GUHP concentration in water was obtained. The... 相似文献
85.
A Te-doped GaSb crystal grown by the method of directed crystallization under microgravitation has been studied by X-ray topography. It is shown that the structural perfection of the crystal part grown without contact with the ampule walls is substantially higher than the structural perfection of the crystals grown under terrestrial conditions. The distribution of a Te dopant in the crystal is studied by quantitative X-ray topography, and it is shown that, if the gap between the growing crystal and the ampule is small, the Marangoni convection in the melt can be less intense than the convection provided by residual microgravitation. The relation between the formation of a flat face on the crystallization front (faceting) and the formation of twins is also established. 相似文献
86.
Bogdanov A. V. Gil’fanova A. R. Zaripova I. F. Voloshin A. D. Mironov V. F. 《Russian Journal of General Chemistry》2018,88(8):1748-1750
Russian Journal of General Chemistry - New isatin derivatives bearing benzotriazole substituent at the endocyclic nitrogen atom were synthesized. The resulting compounds and trimethylammonium... 相似文献
87.
The effect of preliminary magnetic treatment of nonmagnetic KDP crystals on their interaction with a saturated KDP solution has been revealed and investigated for the first time via measuring the saturation temperature. It is shown that the change in the saturation temperature is maximum immediately after the magnetic treatment. Then, this change monotonically decreases and, after 5 h, the saturation temperature approaches the values corresponding to untreated samples. It is established that this effect is saturated at a magnetic induction of 0.02 T. Above this value, the saturation temperature is independent of magnetic field up to 2 T. 相似文献
88.
Yu. A. Zakharov O. B. Kokorina A. V. Voloshin A. A. Sevastianov 《Optics and Spectroscopy》2006,100(6):881-887
The dynamics of the spatial structure of absorbing layers of silver atoms and molecules and condensed particles of sodium chloride and potassium sulfate in a transversely heated graphite atomizer during atomization of these substances from a platform and evaporation of their condensate from a tungsten probe is investigated by shadow spectral visualization. The fractional probe atomization significantly decreases the spatial inhomogeneities of absorbing layers, the level of nonselective absorption, and the suppression of atomic absorption. As a result, the photometric error decreases. The use of a probe made it possible to increase the maximum amounts of sodium chloride and potassium sulfate allowable for interference-free atomic absorption analysis in a silver sample from 100 to 4000 μg and from 20 to 750 μg, respectively. These values exceed by a factor of 5–8 the acceptable levels in the generally accepted procedure of atomization from a platform with the Pd-Mg modifier. 相似文献
89.
At the very first stage of an ultra-relativistic nucleus–nucleus collision new particles are produced in individual nucleon–nucleon collisions. In the transverse plane, all particles from a single NN collision are initially located at the same position. The subsequent thermalization and transverse radial expansion of the system create strong position-momentum correlations and lead to characteristic rapidity, transverse momentum, and azimuthal correlations among the produced particles. 相似文献
90.