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[en] On-line spectrometer for difference spectroscopy of Raman scattering based on ''Electronica-60'' computer with CAMAC interface is described. Using this system small (0.1-1.2 cm-1) frequency shifts of Raman scattering lines under 5x1018 neutron/cm2 α-quartz irradiation are first detected
Journal
[en] Influence of soil processing with halide piperidinediyl on productivity and accumulation of radionuclides by oats is considered. (authors)
Source
Kundas, S.P.; Mel'nov, S.B.; Poznyak, S.S. (International A. Sakharov environmental univ., Minsk (Belarus)); Ministerstvo obrazovaniya Respubliki Belarus', Minsk (Belarus); Ministerstvo prirodnykh resursov i okhrany okruzhayushchej sredy Respubliki Belarus', Minsk (Belarus); Departament po likvidatsii posledstvij katastrofy na Chernobyl'skoj AEhS Ministerstva po chrezvychainym situatsiyam Respubliki Belarus', Minsk (Belarus); Postoyannaya komissiya po radioehkologicheskomu obrazovaniyu stran SNG, Minsk (Belarus); Belorusskij respublikanskij fond fundamental'nykh issledovanij, Minsk (Belarus); Illinois univ., Chikago, Il (United States); UNESKO Office, Moscow (Russian Federation); International A. Sakharov environmental univ., Minsk (Belarus); 380 p; ISBN 978-985-6931-01-0; 
; May 2009; p. 238; 9. International scientific conference 'Sakharov readings 2009: Environmental problems of the XXI century'; Sakharovskie chteniya 2009 goda: ehkologicheskie problemy XXI veka. Materialy 9-j mezhdunarodnoj nauchnoj konferentsii; Minsk (Belarus); 21-22 May 2009
; May 2009; p. 238; 9. International scientific conference 'Sakharov readings 2009: Environmental problems of the XXI century'; Sakharovskie chteniya 2009 goda: ehkologicheskie problemy XXI veka. Materialy 9-j mezhdunarodnoj nauchnoj konferentsii; Minsk (Belarus); 21-22 May 2009
[en] Dynamics of a number of acoustic modes is investigated for the BiVO4 crystals by the method of Mandelstam-Brillouin scattering (MBS) and the temperature dependences of combinations of elastic moduli Asub(g) and Bsub(g) symmetry are determined. The temperature dependences of the MBS components for 14 acoustic waves have been investigated within the 300-550 K temperature range. The crystal thermodynamic potential coefficients are estimated. It is shown that the obtained dependences of elastic moduli Csub(ij)(T) and spontaneous deformations Esub(i)(T) can be satisfactorily described within the framework of the phenomenological Landau theory
Journal
No abstract available
Journal
Fizika Tverdogo Tela; ISSN 0367-3294; ; v. 25(9); p. 2782-2784
; v. 25(9); p. 2782-2784
[en] The intensity of light scattering by soft optical and acoustic modes in the range of ferroelastic phase transition in BiVO4 is considered. The analysis of the results obtained has shown that anomalous part of the intensity of the soft acoustic mode is mainly determined by the temperature dependence of the critical elastic modulus. Elastooptical constant consists of two contributions: constant one describing direct acoustic deformation of crystal, and contribution one, describing the influence of soft optical oscillation
Journal
Izvestiya Akademii Nauk SSSR, Seriya Fizicheskaya; ISSN 0367-6765; ; CODEN IANFA; v. 53(7); p. 1316-1319
; CODEN IANFA; v. 53(7); p. 1316-1319
[en] A correlation between distorted surface of polydomain crystal BiVO4 and the value of spontaneous deformation in domains of different types is established. Proceeding from the relation, temperature dependences of both symmetric and antisymmetric parts of spontaneous deformation tensor are determined. The method used is based on the measurement of angles between sections of neighbouring domain outcome on the crystal surface
Journal
Izvestiya Akademii Nauk SSSR, Seriya Fizicheskaya; ISSN 0367-6765; ; CODEN IANFA; v. 53(7); p. 1373-1377
; CODEN IANFA; v. 53(7); p. 1373-1377
No abstract available
Journal
[en] The processes of the dopant activation in the InP crystals implanted with Be+ ions (energy 100 keV, dose 1013 cm-2 and subsequent thermal annealing during 10 s) have been studied by means of photoreflection spectroscopy. Spectral lines of the crystal InP were absent in the photoreflection spectra of the samples annealed at temperatures less then 400 Deg C. This fact is connected with the disordering of the crystal structure due to the ion implantation. In the temperature range 400-700 Deg C the lines from InP band gap (1.34 eV) and conductance band-spin-orbit splitting valence subband (1.44 eV) have been observed due to the recovery of the crystal structure. In the photoreflectance spectra of a 800 Deg C annealed sample the Franz-Keldysh oscillations have been observed, which can be an evidence in favour of the dopant activation. Carrier concentration calculated from the period of Franz-Keldysh oscillations was equal to 2.2 x 1016 cm-3
[ru]
Методом спектроскопеии фотоотражения исследован процесс активации примеси в кристаллах InP, имплантированных ионами Be+ с энергией 100 кэВ и дозой 1013 cm-2 и подвергнутых термическому отжигу в течение 10 с. При температурах ожига до 400 град C в спектрах отсутствуют линии, характерные для кристаллического InP, что свидетельствует о разупорядочении кристаллической решетки вследствие ионной имплантации. При температурах ожига 400-700 град C в спектрах наблюдаются линии, связанные с фундаментальным переходом InP (1.34 эВ) и переходом между зоной проводимости и спин-орбитально отщепленной подзонной валентной зоны (1.44 эВ), что указывает на восстановление кристаллической структуры. Для образцов, отожженных при температуре 800 град C, в спектре фотоотражения наблюдаются осцилляции Франца-Келдыша, что свидетельствует об активации примеси. По периоду осцилляций определена концентрация свободных носителей, которая составила 2.2 x 1016 см-3Journal
[en] Josephson sandwiches of SNS type with bismuth interlayer are studied. An intensive formation of superconducting β-phase of Pb-Bi system when spraying Bi on a lead film cooled down to 240 K has been revealed. It is shown that the recrystallization takes place in the Bi film when thawing out the SNS system sprayed at temperatures lower 240 K; the recrystallization leads to the mechanical destruction of the whole system. The value of coherent wave length has been measured in Bi films using SINS- type sandwiches with upper superconducting electrode of Pb-Bi alloy or normal Bi interlayer; it equals 30+-10 nm and that is considerably below the previous estimate. Preliminary experiments with Nb-Bi-β structures has shown that high-quality Josephson junctions can be realized if Bi-base superconducting electrode materials are chosen correctly. The junctions have the value of characteristic voltage of the order of 1 mV and normal resistance of 1 Ohm when the area is 1 μm2
[ru]
Journal
Fizika Nizkikh Temperatur; ISSN 0132-6414; ; v. 7(10); p. 1245-1253
; v. 7(10); p. 1245-1253
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