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G. Corradi V.S. Vikhnin Yu.S. Gromovoi I.M. Zaritskii 《Journal of Physics and Chemistry of Solids》1981,42(11):995-1007
An experimental and theoretical investigation of the spin-lattice relaxation (SLR) mechanisms of VK-centers in alkali and alkaline earth halides has been carried out. It has been shown that at low temperatures the main role in SLR is played by rapidly relaxing centers (RRC). In some cases, however, an intrinsic one-phonon SLR process due to modulation of both the isotropic and anisotropic hyperfine (HF) interaction seems to be important. At higher temperatures SLR can be explained by an anharmonic Raman process with the participation of the resonant molecular vibrational (RMV) mode of the VK-center. In this SLR process, similarly to the low-temperature intrinsic process, the spin-phonon coupling is due to the modulation of the HF interaction. Deviations from the Debye phonon spectrum and the local anharmonicity of VK-centers turn out to be important. The SLR of several other hole and interstitial type centers in alkali halides has also been investigated and their SLR mechanisms are discussed. 相似文献
2.
G. P. Gromovoi 《International Applied Mechanics》1991,27(1):27-35
Zaporozh'ye Institute of Mechanical Engineering. Translated from Prikladnaya Mekhanika, Vol. 27, No. 1, pp. 31–40, January, 1991. 相似文献
3.
E. N. Kalabukhova S. N. Lukin Yu. S. Gromovoi E. N. Mokhov 《Physics of the Solid State》1998,40(10):1653-1657
An EPR study of donors in 6H SiC crystals with an uncompensated donor concentration (N
D−N
A) of 2×1018 to 1×1016 cm−3 performed in the temperature range 4.2 to 160 K at frequencies of 9 and 140 GHz showed that 6H
n-SiC samples have two donor states in the gap. One of them originates from nitrogen occupying three inequivalent lattice sites
with ionization energies of 150 and 80 meV, and the second is connected with a structural defect lying deeper in the gap than
nitrogen. The temperature dependences of donor EPR line intensities have been found to deviate from the Curie law. The observed
EPR line-intensity peaks of donors are produced in a temperature-driven successive redistribution of donor electrons between
the donor levels. The temperature dependences of EPR line intensities obtained from samples with low donor concentrations
were used to determine the valley-orbit splitting of nitrogen in cubic sites.
Fiz. Tverd. Tela (St. Petersburg) 40, 1824–1828 (October 1998) 相似文献
4.
Yu. S. Gromovoi 《Journal of Structural Chemistry》1975,16(6):989-990
5.
Datsyuk A. M. Gromovoi T. Yu. Lobanov V. V. 《Theoretical and Experimental Chemistry》2004,40(5):277-280
The electronic structure and stereochemical structure of some types of carbon nanotubes were investigated by quantum-chemical methods. It was found that the "zigzag" configurations have significant dipole moments and are characterized by dimorphism, reflected in the existence of symmetrical and unsymmetrical states. 相似文献
6.
G. P. Gromovoi 《International Applied Mechanics》1994,30(3):184-192
Zaporozh Institute of Mechanical Engineering. Translated from Prikladnaya Mekhanika, Vol. 30, No. 3, pp. 25–34, March, 1994. 相似文献
7.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 55, No. 3, pp. 405–409, September, 1991. 相似文献
8.
A. A. Poyarkov T. Yu. Gromovoi V. A. Pokrovskii S. A. Poyarkova V. P. Kukhar’ 《Theoretical and Experimental Chemistry》2008,44(2):75-79
Features of ion formation under the influence of laser emission under the conditions of MALDI-TOF mass spectrometry in the
glycosylated protein thrombin and the related proteases trypsin and chymotrypsin were studied for the first time. It was shown
that trypsin and chymotrypsin are ionized in the form of molecular ions with masses 23800 and 25660 Da respectively. The molecular
ion of thrombin was not detected; three main fragment ions with masses 9951, 10230, and 11982 Da were detected in the mass
spectrum of thrombin. It was suggested that these fragments relate to peptide and glycopeptides fragment ions formed as a
result of bond cleavage in the region of Asn60G during exposure to laser emission under the conditions of MALDI-TOF mass spectrometry.
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Translated from Teoreticheskaya i éksperimental’naya Khimiya, Vol. 44, No. 2, pp. 74–78, March–April, 2008. 相似文献
9.
V.S. Vikhnin Yu.S. Gromovoi I.M. Zaritskii G. Corradi 《Journal of Physics and Chemistry of Solids》1978,39(10):1113-1118
The angular and temperature dependences of the spin-lattice relaxation (SLR) rate of Vk-centers in LiF doped with Mg or Ag have been investigated. In the temperature interval 4.2–100 K the results can be fitted by the formula with A(0°) = 0.11 sec?1K?1, A(90°) = 1.3 sec?1K?1, B = 3 × 105sec?1 and Δ = (175 ± 15)K.A mechanism for the SLR is considered, assuming the modulation of the hyperfine interaction by phononinduced transitions between the ground and excited states of the resonant molecular vibrations of the Vk-center. This mechanism is found to explain the value, the temperature dependence and the isotropy of τ?1 in the interval T = 20–100 K.The one-phonon SLR mechanisms of the Vk-center in the T < 10 K region are discussed. 相似文献
10.
T. Yu. Gromovoi V. N. Bondarenko V. E. Titov V. A. Pokrovskii V. G. Koshechko 《Theoretical and Experimental Chemistry》2009,45(3):180-185
A comparative analysis was carried out on the laser desorption/ionization (LDI) mass spectra of fluorine derivatives of N-phenylphenylglycine
using different targets. The extent of generation of molecular ions of the fluorine-containing amino acids was shown to depend
significantly on the nature of the target surface. Alkali metal chlorides (LiCl, NaCl, KCl, and CsCl) have the highest efficiency
among the targets studied (standard metal target, polished monocrystalline silicon, glass, silica) in the generation of molecular
ions of fluorine-containing amino acids, which increases in the series LiCl < NaCl < KCl < CsCl.
Translated from Teoreticheskaya i éksperimental’naya Khimiya, Vol. 45, No. 3, pp. 167-172, May-June, 2009. 相似文献
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