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81.
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A previously unknown feature of the kinetics of the radiolysis of water and hydrogen, oxygen, and hydrogen peroxide solutions has been discussed. By calculation, it has been revealed that concentration oscillations of the radiolysis products can appear during irradiation of the solution with fast neutrons or mixed n,γ-radiation with a high portion of the neutron component. The period and amplitude of the oscillations depend on the temperature, the dose rate, and the ratio of n/γ radiation components. It has been shown that oscillations cannot be excited during γ-radiolysis under any conditions. It is suggested that the mechanism of the oscillations is similar to the Belousov-Zhabotinsky reaction mechanism. A chain reaction proceeds in the irradiated system, in which the reactants H2O2 (“reducing agent”), “oxidizing agent” OH radicals initiating the chain, and the “catalyst” are introduced from the outside. Hydrogen molecules produced by the action of radiation play the role of the “catalyst”, and H2O molecules formed in the secondary reactions are the “deactivated form of the catalyst”. Hydrogen atoms and hydrated electrons propagate the chain. Oxygen formed in both spurs and the secondary reactions is the “inhibitor” terminating the chain reaction. 相似文献
84.
Victor P. Arkhipov Elisaveta F. Potapova Oleg N. Antzutkin Andrei V. Filippov 《Magnetic resonance in chemistry : MRC》2013,51(7):424-430
The structure and dynamic properties of micellar solutions of nonionic surfactants of a series of isononylphenol ethoxylates, C9H19C6H4O(C2H4O)nH (where n = 6,8,9,10, and 12), were studied by NMR diffusometry, dynamic light scattering, and viscosimetry. The sizes of the micelles were determined for different surfactants and at different surfactant concentrations. The numbers of water molecules bound by a micelle and by one oxyethylene group of the surfactant were estimated. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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Arkhipov P. A. Kholkina A. S. Zaikov Yu. P. Molchanova N. G. 《Russian Journal of Electrochemistry》2020,56(1):82-86
Russian Journal of Electrochemistry - Equilibrium potentials of antimony in the KCl–PbCl2–SbCl3 melt are measured by the EMF method as a function of the temperature and the content of... 相似文献
87.
Arkhipov B. V. Shapochkin D. A. 《Computational Mathematics and Mathematical Physics》2019,59(2):301-312
Computational Mathematics and Mathematical Physics - A model of oil spill spreading described by partial differential equations based on the balance of the forces acting on an axisymmetric slick is... 相似文献
88.
JETP Letters - Electromagnetically induced gratings (EMIGs) of atomic populations are formed in the resonant media at the interference of two or more overlapping monochromatic beams. They are of... 相似文献
89.
N. N. Rosanov M. V. Arkhipov R. M. Arkhipov A. V. Pakhomov I. V. Babushkin 《Optics and Spectroscopy》2017,123(1):100-104
The possibility of diagnosing the linear and nonlinear electrodynamic susceptibilities of media by examining the time profiles of extremely short terahertz radiation pulses (using pulsed terahertz spectroscopy methods) that are incident on a thin layer of a medium under study, are reflected from the layer, and are transmitted through it is shown theoretically. In the general case, the linear and nonlinear susceptibilities of different orders can be found by solving linear integral equations. Diagnostics is considerably simplified in the case of an isolated resonance of a medium with homogeneous spectral broadening, which is modeled by the response of an anharmonic oscillator. 相似文献
90.
Arkhipov R. M. Arkhipov M. V. Pakhomov A. V. Obraztsov P. A. Rosanov N. N. 《JETP Letters》2023,117(1):8-23
JETP Letters - In recent years, progress has been made in obtaining extremely short electromagnetic pulses up to single-cycle and unipolar half-cycle pulses. For pulses with such a dependence of... 相似文献