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Hrant Yeritsyan Vachagan Harutiunian Volodia Gevorkyan Norair Grigoryan Eleonora Hakhverdyan Sergey Nikoghosyan Aram Sahakyan Rudolf Gevorgyan Hakob Sargisyan Yeghis Keheyan 《Central European Journal of Physics》2005,3(4):623-635
Infrared (IR) absorption and luminescence in chemically and radiation-modified natural Armenian Zeolite (clinoptilolite) samples
have been studied. The luminescence was studied in 390–450 nm and 620–710 nm wavelength bands, and the IR measurements were
carried out in the 400–5400 cm−1 range. It is shown that the luminescence intensity depends on the content of pure clinoptilolite in the samples and, probably
on the distribution of “passive” luminescence centers over Si and Al sites that became “active” under radiation or chemical
treatment. The samples of electron irradiated clinoptilolite have higher luminescence intensity than the chemically and thermally
treated ones. A decrease in the intensity of IR absorption bands at 3550 cm−1 and 3650 cm−1 was found after irradiation. 相似文献
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Melikyan A. A. Ovakimyan N. V. Harutiunian L. L. 《Journal of Optimization Theory and Applications》1998,98(3):515-543
The complete solution of two differential games with simple motion on a two-dimensional cone is presented. The method of generalized (singular) characteristics is used for the analysis of singular paths. The level lines of the game value and optimal phase portrait are constructed, and the latter is shown to include several types of singular surfaces (dispersal, equivocal, universal). An algorithm is developed for the construction of the synthesis for both players and is used in computer simulation. 相似文献
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Hrant Yeritsyan Aram Sahakyan Sergey Nikoghosyan Vachagan Harutiunian Volodia Gevorkyan Norair Grigoryan Eleonora Hakhverdyan Yeghis Keheyan Rudolf Gevorgyan Hakob Sargisyan 《Central European Journal of Physics》2005,3(4):610-622
The results of dielectric properties and direct current specific electric conductivity measurements in Armenian natural clinoptilolite
samples are presented. Electron irradiation with energy 8 MeV and thermal treatment of samples are performed to elucidate
possible enhancement mechanisms of clinoptilolite parameters. The results are discussed on the basis of new point structural
defects formation and recombination of initial ones in samples. It was shown that the irradiation dose of 3·1016 el/cm2 is critical for natural zeolite structural change, which is manifested by significant changes in dielectric properties and
other characteristics. The samples subjected to high temperature heating after electron irradiation, in comparison with an
unquenched one, have a significantly higher (about an order of magnitude) value of specific conductivity. 相似文献
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