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排序方式: 共有188条查询结果,搜索用时 384 毫秒
181.
182.
S. A. Ivanenko E. A. Manykin G. V. Naidis B. B. Zelener B. V. Zelener 《Laser Physics》2007,17(4):419-423
Ultracold Rydberg plasma formed by a dye laser has been studied theoretically. Recombination properties in the presence of three-body collisions in hydrogen-like plasma have been investigated. We have shown that the existing calculation models for three-body recombination (Thomson model, diffusion approximation, and modified diffusion approximation) work only in the high-electron-temperature region—more than or equal to 1 eV. When the electron temperature is substantially less 1 eV, we have found the strong dependence of process probability on the energy of free particle. As a result, there is a drastic slowdown recombination in the region, where the three-body recombination dominates. Another reason for this slowdown of the recombination deals with the increment nonideality parameter. Effect of slowdown of recombination with free-body collisions can be reduced to the situation when the thermal equilibrium is set earlier than the ionization equilibrium, and, hence, the formation of metastable structure is possible in the plasma. Also this effect can cause the inverse population on Rydberg levels. 相似文献
183.
K. V. Mitsen O. M. Ivanenko S. Yu. Burkin 《Bulletin of the Lebedev Physics Institute》2007,34(6):168-173
The dependence of the superconducting (Meissner) phase volume V m on the YBa2Cu3O6+δ doping level was studied. It was found that V m monotonically decreases as the doping level is lowered and vanishes at the same value of δ ~ 0.3 as Tc does. It was concluded that the Tc decrease and the increase in the pseudogap formation temperature T* as the doping level is lowered are caused by a decrease in the average size of superconducting clusters. This conclusion suggests an extraordinary superconductivity mechanism in HTSC. 相似文献
184.
Yablokova M. A. Ivanenko A. Yu. Ponomarenko E. A. 《Russian Journal of Applied Chemistry》2021,94(11):1525-1535
Russian Journal of Applied Chemistry - A new technology was proposed for the disposal of waste generated after delayed bitumen coking units. It was shown that when pressing small non-commercial... 相似文献
185.
Yu. V. Gerasimova A. S. Oreshonkov A. A. Ivanenko M. S. Molokeev L. I. Isaenko I. N. Flerov E. V. Bogdanov M. V. Gorev A. V. Kartashev A. S. Krylov 《Physics of the Solid State》2014,56(3):599-605
The structure, infrared and Raman spectra, heat capacity, and thermal expansion have been investigated. It has been shown that, down to liquid-helium temperatures, the cubic pyrochlore structure of the CsMnMoO3F3 and CsZnMoO3F3 oxyfluorides remains stable. The influence of cation substitution on individual features of the properties of the oxyfluorides has been analyzed. 相似文献
186.
B. N. Gikal S. N. Dmitriev G. G. Gul’bekyan P. Yu. Apel’ S. L. Bogomolov O. N. Borisov V. A. Buzmakov V. A. Verevochkin A. A. Efremov I. A. Ivanenko G. N. Ivanov N. Yu. Kazarinov V. I. Kazacha I. V. Kalagin I. V. Kolesov V. M. Kononov A. A. Korolev V. A. Kostyrev A. M. Lomovtsev V. N. Mel’nikov V. I. Mironov S. V. Pashchenko V. A. Sokolov N. F. Osipov A. V. Tikhomirov A. A. Fateev M. V. Khabarov 《Physics of Particles and Nuclei Letters》2014,11(2):137-150
The DC-110 heavy ion cyclotron for industrial production of track membranes has been developed and created at the Laboratory of Nuclear Reactions of the Joint Institute for Nuclear Research. The cyclotron is equipped with an electron cyclotron resonance ion source operating at a frequency of 18 GHz. The accelerator complex was put into operation in 2012 and 40Ar6+, 86Kr13+, and 132Xe20+ ion beams with a energy of 2.5 MeV/nucleon and intensity of 13, 14.5, and 10.5 μA, respectively, were produced. Irradiation of a polymer film was carried out on a specialized channel and track membranes with a high uniformity of pores were obtained. The DC-110 accelerator complex can produce up to 2 million square meters of track membranes per year. 相似文献
187.
A. P. Ivanenko N. M. Kompanichenko A. A. Omelchuk V. F. Zinchenko E. V. Timukhina 《Russian Journal of Inorganic Chemistry》2010,55(6):841-847
Nonstoichiometric samarium, europium, ytterbium, and thulium fluorides were prepared by reduction of the corresponding trifluorides
with the same lanthanide metal or silicon. Crystal lattice type and lattice parameters of the compounds were determined by
powder X-ray diffraction. In the synthesis of ytterbium fluoride, the formation of cubic superstructure Yb27F64 was detected. Data reflecting the relationship between the structure and optical characteristics of the phases (IR spectra,
electronic diffuse reflectance spectra) were obtained and the spectral bands were assigned. 相似文献
188.
V. V. Khvostov O. A. Streletskiy V. V. Yakunin I. P. Ivanenko E. A. Kralkina V. B. Pavlov 《Moscow University Physics Bulletin》2012,67(1):71-76
Carbon films with high conductivity anisotropy were obtained via sputtering a graphite target with an accelerated argon ion
beam. The film structure was studied using Raman spectroscopy (combination scattering spectroscopy), transmission high-resolution
electron microscopy, chemical analysis, X-ray photoelectron spectroscopy, and tunnel spectroscopy. We found conductivity anisotropy
along and across the film chains of the order of 104, which is associated with a high content of linear carbon chains with sp hybridization of bonding orbitals. 相似文献