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81.
N. D. Koshel’ Yu. V. Grebenyuk E. A. Baranova 《Russian Journal of Electrochemistry》2000,36(7):761-766
A model of contact between an electrode and a MF-4SK membrane in sulfuric acid solutions is studied by the impedance method.
It is shown that a layer of higher electrolyte concentration forms near the free electrode surface in heavily diluted solutions.
The layer ensures participation of this surface in the electrode process. Electrical fields in the region of contact between
the membrane and a current collector are calculated 相似文献
82.
O. V. Miklukho N. P. Aleshin S. L. Belostotski O. G. Grebenyuk O. Ya. Fedorov A. A. Izotov A. Yu. Kisselev Yu. G. Naryshkin V. V. Nelyubin A. N. Prokofiev D. A. Prokofiev Yu. A. Shcheglov A. V. Shvedchikov V. V. Vikhrov A. A. Zhgun A. A. Zhdanov 《Physics of Atomic Nuclei》2000,63(5):824-833
Polarization measurements in the A(p, 2p)B reactions on 6Li, 7Li, and 28Si nuclei at a proton-beam energy of 1 GeV were performed in a kinematically complete experiment. By using a two-arm magnetic spectrometer, two secondary protons were recorded in coincidence at asymmetric scattering angles of θ1=15°?26° and θ2=58.6° for residual-nucleus momenta in the range K B=0–150 MeV/c. Either arm of the spectrometer was equipped with polarimeters based on proportional chambers. The data coming from this experiment are analyzed within the distorted-wave impulse approximation. It is shown that the polarization of recoil protons formed at angle θ2 in the interaction featuring a proton from the P shell of the 7Li nucleus can be described under the assumption of an effective intranuclear-proton polarization by using the single-particle shell-model wave function of the nucleus. Our data on the polarizations of the two protons from the reaction (p, 2p) on a 28Si nucleus also suggest the effective polarization of the protons in the D shell of the 28Si nucleus. It is found that, for high recoil-nucleus momenta of K B≥90 MeV/c, the effective polarization of the protons in the P shell of the 6Li nucleus—this polarization was discovered in studying the polarization of recoil protons in the reaction 6Li(p, 2p)5He—cannot be described within the shell model assuming LS coupling. As might have been expected, the polarization of recoil protons knocked out from the S shells of the 6Li and 7Li nuclei comply well with the predictions obtained in the impulse approximation with allowance for the depolarization effect alone. 相似文献
83.
A. I. Chobal’ I. M. Rizak A. G. Grebenyuk V. M. Rizak 《Physics of the Solid State》2010,52(7):1468-1474
The results obtained from ab initio calculations of the optimized configuration and electronic structure of the cluster models
of Sn2P2S6 ferroelectric crystals are presented. The calculations have been performed using the spin-restricted Hartree-Fock method
and the density functional theory in the DZVP basis set. It has been shown that the clusters are stable and retain the topology
of the simulated crystal. The influence of the cluster sizes on the properties under investigation has been analyzed. 相似文献
84.
M. V. Savos’kin A. P. Yaroshenko R. D. Mysyk V. I. Shologon S. V. Khripunov S. A. Grebenyuk I. E. Nosyrev L. A. Prokof’eva 《Russian Journal of Applied Chemistry》2012,85(2):172-176
Effect exerted by the synthesis conditions of residual graphite nitrate in the system concentrated nitric acid-glacial acetic
acid-water on the properties of the final product was studied in wide consumption range of the reagents. The optimal ratio
of the reagents was determined. The dependence of expansion coefficient on the loss of mass by the expanded product was determined. 相似文献
85.
M.K. Islam S. Biswas N.A. Chowdhury A. Mannan M. Salahuddin AA Mamun 《等离子体物理论文集》2022,62(1):e202100073
A theoretical investigation has been carried out on the propagation of non-linear ion-acoustic shock waves (IASHWs) in a magnetized degenerate quantum plasma system composed of inertial non-relativistic positively charged light and heavy ions, inertialess non-relativistically or ultra-relativistically degenerate electrons and positrons. The reductive perturbation method has been employed to derive the Burgers' equation. It has been observed that under consideration, our plasma model supports only positive potential shock structure. It is also found that the amplitude and steepness of the IASHWs have been significantly modified by the variation of ion kinematic viscosity, oblique angle, number density, and charge state of the plasma species. The results of our present investigation will be helpful for understanding the propagation of IASHWs in white dwarfs and neutron stars. 相似文献
86.
Borodin A. Grebenyuk V. Grinyuk A. Pan A. Sagan Y. Tkachev L. Wischnevsky R. 《Physics of Atomic Nuclei》2020,83(2):268-271
Physics of Atomic Nuclei - IACTs are one of the key parts of the TAIGA observatory and designed for study of gamma rays and charged cosmic rays in the energy range of 10 $${}^{13}{-}10^{18}$$ eV.... 相似文献
87.
Several examples and models based on noncommutative differential calculi on commutative algebras indicate that a metric should be regarded as an element of the left-linear tensor product of the space of 1-forms with itself. We show how the metric compatibility condition with a linear connection generalizes to this framework. 相似文献
88.
Commensurability between inter-vortex distance and crystal lattice constant is investigated by angular dependent magnetization
in very pure twinned and twin-free NdBa2 Cu3 Oy single crystals. With increasing temperature the incommensurate states split up and become finally commensurate with half
the vortex distance. These new commensurate states are related to a substructure of the intrinsic pinning potential within
the unit cell and discussed with respect to temperature, field, anisotropy, and twin structure. 相似文献
89.
B. A. Khrenov V. V. Alexandrov D. I. Bugrov G. K. Garipov N. N. Kalmykov M. I. Panasyuk S. A. Sharakin A. A. Silaev I. V. Yashin V. M. Grebenyuk D. V. Naumov A. G. Olshevsky B. M. Sabirov R. N. Semenov M. Slunechka I. I. Skryl L. G. Tkatchev O. A. Saprykin V. S. Syromyatnikov V. E. Bitkin S. A. Eremin A. I. Matyushkin F. F. Urmantsev V. Abrashin V. Koval Y. Arakcheev A. Cordero O. Martinez E. Morena C. Robledo H. Salazar L. Villasenor A. Zepeda I. Park M. Shonsky J. Zicha 《Physics of Atomic Nuclei》2004,67(11):2058-2061
The KLYPVE space experiment has been proposed to study the energy spectrum, composition, and arrival direction of ultrahigh-energy cosmic rays (UHECR) by detecting from satellites the atmosphere fluorescence and scattered Cherenkov light produced by EAS, initiated by UHECR particles. The TUS setup is a prototype KLYPVE instrument. The aim of the TUS experiment is to detect dozens of UHECR events in the energy region of the GZK cutoff, to measure the light background, to test the atmosphere control methods, and to study stability of the optical materials, PMTs, and other instrumental parts in space environment. 相似文献
90.
MJ Lazaro AA Herod M Domin Y Zhuo CA Islas R Kandiyoti 《Rapid communications in mass spectrometry : RCM》1999,13(14):1401-1412
Three methods for determining a 'safe' estimate for high-mass limits of MALDI spectra of coal derived liquids were explored, using a sample of coal-tar pitch and its pyridine-insoluble fraction. Co-addition of increasing numbers of single-shot spectra (10, 30, 50 and 100 pulses) showed visually observable reductions in noise levels, consistent with robust and statistically meaningful signals. Three separate types of post-acquisition calculation were used to identify high-mass limits of the spectra. (i) A literature method indicated high-mass limits similar to those observed visually-as a shift from baseline at the highest masses, nearly 350 000 u for the coal tar pitch and about 390 000 u for its pyridine insoluble fraction. (ii) Comparing instrument signal with pre-selected multiples of the standard deviation, upper mass estimates of between 40-60 000 u for the coal-tar pitch and about 95 000 u for its pyridine-insoluble fraction were found. (iii) Calculation of the slope was used to identify 'lift-off' of the spectrum from baseline. The angle between the smoothed spectrum and the baseline was matched to a pre-selected value (e.g. 0.5 degrees and 1 degrees ). However, the arbitrary specification of the key parameter did not establish this last method on a firm basis. The choice of a criterion for estimating high-mass limits of MALDI spectra remains a semi-quantitative procedure; a reasonably conservative high-mass limit may be estimated by comparison of signal with five times the standard deviation. However, evaluation of size exclusion chromatograms of the present samples using polystyrene standards suggests that molecular mass distributions of pitch samples arrived at by MALDI mass spectrometry are, at least partly, determined by the limitations of available instruments. Copyright 1999 John Wiley & Sons, Ltd. 相似文献