Výsledky vyhledávání - "O. E. Koval'chuk"

Fine Structure of the Photoluminescence Spectrum of Diamond under the Multiple Emission of an Optical Phonon during the Autolocalization of Photoexcited Electrons

Autor: A. O. Levchenko, Andrey A. Ionin, A. E. Rupasov, Roman A. Khmelnitskii, Nikita Smirnov, Sergey I. Kudryashov, Pavel Danilov, O. E. Koval’chuk

Publikováno v: JETP Letters. 112:533-536

The autolocalization of electrons photoexcited by laser pulses with a wavelength of 525 nm in the visible range and with a duration of 150 fs in an electron-hole plasma (density ∼1021 cm−3) in natural diamond at room temperature occurs unsteadily

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1b72b1987976204207e69fb6dd79cc04
https://doi.org/10.1134/s0021364020210080

Zobrazit plný text záznamu

Selective Attachment of Luminophore-Bearing Emulsion at Diamonds—Mechanism Analysis and Mode Selection

Autor: V. V. Morozov, G. P. Dvoichenkova, O. E. Koval’chuk, V. N. Yakovlev, Yu. A. Podkamennyi, V. A. Chanturia

Publikováno v: Journal of Mining Science. 56:96-103

The authors present an efficient modification method of X-ray fluorescence separation with mineral and organic luminophores used to adjust spectral and kinetic characteristics of anomalously luminescent diamonds. The mechanism of attachment of lumino

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f25e54d909515aad7e68dfd6f2572ac1
https://doi.org/10.1134/s1062739120016527

Zobrazit plný text záznamu

Experimental Substantiation of Luminophore-Containing Compositions for Extraction of Nonluminescent Diamonds

Autor: V. N. Yakovlev, Yu. A. Podkamennyi, O. E. Koval’chuk, V. A. Chanturia, G. P. Dvoichenkova, V. V. Morozov

Publikováno v: Journal of Mining Science. 55:116-123

The procedure is developed for modification of diamond surface by luminophore-containing organic compositions. The compositions are composed of an organic luminophore—scintillation anthracene, inorganic luminophore K-35 and cetane. Indication compo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::121606bd9b38f43abc67bb3c44bd9f7d
https://doi.org/10.1134/s106273911901536x

Zobrazit plný text záznamu

Broadband and fine-structured luminescence in diamond facilitated by femtosecond laser driven electron impact and injection of 'vacancy-interstitial' pairs

Autor: Mayya Uspenskaya, A. O. Levchenko, Sergey I. Kudryashov, E. A. Oleynichuk, O. E. Koval’chuk, Pavel Danilov, Roman A. Khmelnitskii, Michael Kovalev, Nikita Smirnov

Publikováno v: Optics letters. 46(6)

Ultrafast heating of photoionized free electrons by high-numerical-aperture (0.25–0.65) focused visible-range ultrashort laser pulses provides their resonant impact trapping into intra-gap electronic states of point defect centers in a natural IaA/

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb6d6af12b58486dd75e976519b92931
https://pubmed.ncbi.nlm.nih.gov/33720206

Zobrazit plný text záznamu

Signatures of ultrafast electronic and atomistic dynamics in bulk photoluminescence of CVD and natural diamonds excited by ultrashort laser pulses of variable pulsewidth

Autor: Sergey I. Kudryashov, Pavel Danilov, O. E. Koval’chuk, M. S. Kovalev, A. O. Levchenko, Svetlana N. Shelygina, Alexey E. Rupasov, Islam V. Sozaev, Nikita Smirnov, N. G. Stsepuro, Yulia S. Gulina, Evgeny V. Kuzmin, Ekaterina A. Oleynichuk, Roman A. Khmelnitskii

Publikováno v: Applied Surface Science. 575:151736

Inter-band photoexcitation in bulk natural and synthetic diamonds by tightly focused near-IR (1030 nm) ultrashort laser pulses of variable duration (0.3–6.3 ps) promotes characteristic UV photoluminescence A-band and phonon-mediated free-exciton re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8a636ee4af1708e08ddb1c2590ea8d88
https://doi.org/10.1016/j.apsusc.2021.151736

Zobrazit plný text záznamu

Experimental Justification of Luminophore Composition for Indication of Diamonds in X-Ray Luminescence Separation of Kimberlite Ore

Autor: G. P. Dvoichenkova, Yu. A. Podkamenny, V. N. Yakovlev, O. E. Koval’chuk, V. A. Chanturia, V. V. Morozov

Publikováno v: Journal of Mining Science. 54:458-465

Organic and inorganic luminophores of similar luminescence parameters as diamonds are selected. Indicators, based on the selected luminophores, are synthesized. Spectral and kinetic characteristics of luminophores are experimentally determined for ma

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1e7bd7a4d5f56211ab3e29f1ae47a49d
https://doi.org/10.1134/s1062739118033858

Zobrazit plný text záznamu

Zoning of Faults and Secondary Mineralization of Host Rocks of Kimberlites of the Maiskoe Diamond Deposit, Nakyn Field, Yakutia

Autor: M. S. Khodnya, A. N. Razumov, K. V. Novikov, P. A. Ignatov, N. R. Zaripov, A. M. Shmonov, O. K. Kilishekov, S. G. Kryazhev, O. E. Koval’chuk

Publikováno v: Geology of Ore Deposits. 60:201-209

Study of faults and secondary mineralization of host rocks of diamond-bearing kimberlites yields important data for local prediction of kimberlite bodies. Of special methodological interest are exploration data on deposits where the study of host roc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::46d9fa55922373661a46b3e6def56dd7
https://doi.org/10.1134/s1075701518030030

Zobrazit plný text záznamu

Femtosecond-laser-excited luminescence of the A-band in natural diamond and its thermal control

Autor: Pavel Danilov, Sergey I. Kudryashov, O. E. Koval’chuk, M. S. Kovalev, Andrey A. Ionin, A. O. Levchenko, Yulia S. Gulina, Nikita Smirnov

Publikováno v: Optical Materials Express. 11:2505

Ultrafast visible-range excitation in natural diamond produces UV-VIS A-band photoluminescence with marginal zero-phonon line and intense regular multi-peak optical-phonon progression. The A-band photoexcitation can occur via band-center, center-cent

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3d45e629a85d04a8519d6d5f40029584
https://doi.org/10.1364/ome.427788

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání