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排序方式: 共有170条查询结果,搜索用时 15 毫秒
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A. B. Aleskandrov M. S. Vladimirov L. A. Goncharova N. S. Konovalova G. I. Orlova N. G. Peresad’ko N. G. Polukhina N. I. Starkov M. M. Chernyavskii A. O. Shchelkanov 《Instruments and Experimental Techniques》2007,50(4):469-473
A technique for measuring the charges of relativistic nuclei in thick emulsion layers irradiated in a longitudinal direction is described. This technique has been implemented on the PAVICOM completely automated facility at the Lebedev Physical Institute. The calibration curves for relativistic nuclei with Z > 3 are presented. The advantages of this technique are demonstrated using charge measurements of 28Si nuclear fragments as an example. 相似文献
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S. A. Kulyukhin L. V. Mizina E. V. Zanina I. A. Rumer N. A. Konovalova D. S. Levushkin 《Radiochemistry》2012,54(4):368-378
The paper deals with the synthesis and physicochemical properties of sorbents based on coarsely dispersed silica gel, containing 1, 2, 4, and 8 wt % nanoparticles of Ag compounds, intended for localization of volatile radioactive iodine compounds from the water vapor-air medium. 相似文献
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N. M. Kazyuchits A. V. Konovalova I. I. Azarko F. F. Yakotsuk I. N. Bogdanov Yu. K. Kabak 《Inorganic Materials》2014,50(2):130-135
Diamond single crystals synthesized under various conditions have been characterized by absorption spectroscopy and electron paramagnetic resonance. The results demonstrate that preannealing of the reaction cell materials in an argon-hydrogen mixture and the use of a metal-carbon system containing 3 wt % aluminum allow the concentration of process-related impurities in the single crystals to be reduced. The growing crystal captures more impurities in the initial stages of the process, so the impurities are concentrated in the central part of the crystal, near the seed. The concentration of the process-related impurities near the corners of the crystal is substantially lower. 相似文献
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G. M. Strelkov A. V. Konovalova 《Journal of Communications Technology and Electronics》2010,55(7):721-732
A rectangular radio pulse formed on the basis of the Barker code and transmitted over a long-distance ionospheric path is
considered. The character of signal distortions and the rate of their increase are analyzed. The determining effect of the
initial duration and carrier frequency of the signal on its current characteristics is revealed. For the decameter wavelength
band, it is shown, that, when the parameters of the problem vary within a wide range, the autocorrelation function of a Barker
signal is deformed, its center maximum being preserved and substantially spread. 相似文献
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Sorption of 85Sr, 137Cs, and 152Eu from solutions on mixed hexacyanoferrates of potassium and uranyl
S. A. Kulyukhin E. P. Krasavina M. P. Gorbacheva I. A. Rumer N. A. Konovalova L. V. Mizina N. V. Tanashchuk 《Radiochemistry》2007,49(1):76-81
Sorption of 85Sr, 137Cs, and 152Eu from neutral and acidic solutions on mixed hexacyanoferrates of potassium and uranyl K4(UO2)4[Fe(CN)6]3 · 4H2O and K2(UO2)5[Fe(CN)6]4 · 3H2O is studied. The distribution coefficients of 85Sr, 137Cs, and 152Eu between the solid phase of K2(UO2)5[Fe(CN)6]4 · 3H2O and the aqueous phase are determined to be 210±10, 3000±500, and 1100±250 ml g?1, respectively, at a contacting time of 120 min. For solid K4(UO2)4[Fe(CN)6]3 · 4H2O, the respective values are 6670±900, 5600±300, and 3300±250 ml g?1. The 85Sr, 137Cs, and 152Eu distribution coefficients K d between the solid K4(UO2)4[Fe(CN)6]3 · 4H2O and the aqueous phase decrease with decreasing pH. 相似文献