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  • 1
    Electronic Resource
    Electronic Resource
    Depolarization of a neutron beam in Laue diffraction by a noncentrosymmetric crystal (2000)
    Springer
    JETP letters 72 (2000), S. 308-311 
    Details
    ISSN: 1090-6487
    Keywords: 14.20.Dh ; 13.40.Em ; 61.12.Ex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The depolarization of a neutron beam executing Laue diffraction in a thick (∼3.5 cm) noncentrosymmetric α-quartz crystal is observed. This effect was predicted by us earlier and suggested for measuring the electric dipole moment (EDM) of a neutron. The effect is due to an interaction of the magnetic moment of a moving neutron with a strong crystal electric field, as a result of which the neutron spin rotates in opposite directions for waves of two types excited in the crystal. The effect is studied for neutron diffraction by a system of crystallographic (110) planes at Bragg angles close to π/2, up to 87°. It is shown that, for a crystal of thickness L=3.5 cm, a direct beam initially polarized along the reciprocal lattice vector becomes depolarized upon diffraction, irrespective of the value of Bragg angle, whereas the beam polarized perpendicular to the diffraction plane retains its polarization. The Eτ value determining the sensitivity of the method to EDM is experimentally estimated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1328444
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  • 2
    Electronic Resource
    Electronic Resource
    Direct measurement of the delay time for a neutron in a crystal in the case of the Laue diffraction (2000)
    Springer
    JETP letters 71 (2000), S. 76-79 
    Details
    ISSN: 1090-6487
    Keywords: 61.12.Ld ; 61.12Bt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The dynamical Laue diffraction has been studied for a direct beam diffracted from a thin (∼3.5 cm) α-quartz crystal at the Bragg angles close to 90°. It is shown that diffraction occurs at Bragg angles up to 87°. The time-of-flight method is used to measure the time of the neutron presence in the crystal under the diffraction conditions. The time delay for a scattered neutron inside the crystal predicted earlier for the Bragg angles close to 90° confirmed experimentally. The effective velocity of the neutron propagation in a crystal measured at the incident-neutron velocity of 810 m/s and the diffraction angle of 87° equals (43±1) m/s. The result obtained confirms the possibility of increasing, by an order of magnitude, the sensitivity of the diffraction method of determining the dipole moment of a neutron at Bragg angles close to 90° predicted earlier theoretically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.568284
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  • 3
    Electronic Resource
    Electronic Resource
    Optical echo spectroscopy and phase relaxation of Nd3+ ions in CaF2 crystals (1998)
    Springer
    Journal of experimental and theoretical physics 86 (1998), S. 156-163 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Accumulated photon echoes have been used to investigate the mechanisms of optical dephasing in CaF2 crystals activated by Nd3+ ions. Tunable picosecond laser radiation, which permits the selective excitation of various Nd3+ optical centers in the 4 I 9/2→4 G 5/2, 2 G 7/2 transition, is used. The optical phase relaxation times measured at temperatures from 9 to 50 K permit determination of the homogeneous widths of the transitions between the low-lying 4 I 9/2 Stark level and three excited 4 G 5/2, 2 G 7/2 levels, and calculation of the constants of the inter-Stark relaxation transitions in the ground and excited multiplets for the rhombic N and M Nd3+ centers in CaF2 crystals. An analysis of the temperature dependence of the homogeneous linewidth of the transitions between low-lying Stark levels of the ground and excited states shows that the mechanism of optical dephasing in the crystals investigated is described well by direct relaxation processes with resonant inter-Stark absorption of one phonon in the ground and excited states. At T=9 K, the homogeneous linewidth Γh in CaF2 crystals is almost an order of magnitude smaller than Γh in disordered CaF2-YF3 crystals. This difference can be attributed to the significantly greater spectral phonon density of states in disordered crystals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.558480
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  • 4
    Electronic Resource
    Electronic Resource
    Automated laser system for remote measuring of the sea water fluorescence (1991)
    Springer
    Physical oceanography 2 (1991), S. 387-391 
    Details
    ISSN: 0928-5105
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A short description of the fluorescent shipboard lidar based on a solid-state laser and two PRAVETS-8 personal computers is presented. Results of field observations are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02197772
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  • 5
    Electronic Resource
    Electronic Resource
    Spectroscopic analysis and persistent photon-gated spectral hole burning in LiF:F2− color center crystal (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 2318-2320 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Luminescence and absorption spectra of LiF crystals with F2− color centers (CCs) were studied in the 14–300 K temperature range. The Huang–Rhys factors measured from absorption and emission spectra were equal in magnitude and calculated to be 3.2 and 2.72 at 77 and 300 K, respectively. It was shown that below 40 K inhomogeneous broadening of the zero phonon line of the F2− CC prevails over homogeneous broadening. Inhomogeneous broadening of the zero phonon line was observed to vary from 5 to 15 cm−1 for different crystal preparations. Persistent spectral hole burning stable at room temperature was realized in LiF:F2− crystals. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1406563
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  • 6
    Electronic Resource
    Electronic Resource
    The ergodynamic concept of fracture. Communication 3. Structure and criteria of fracture toughness (1991)
    Springer
    Strength of materials 23 (1991), S. 1081-1085 
    Details
    ISSN: 1573-9325
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The article examines the correlation of fracture toughness with the structure of the material. It suggests ergodynamic methods of predicting criteria of fracture toughness taking the structure of the material and the conditions of loading into account. A possible structural mechanism of crack nucleation and growth is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00771915
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  • 7
    Electronic Resource
    Electronic Resource
    The ergodynamic concept of failure. 2. Kinetics of crack propagation (1991)
    Springer
    Strength of materials 23 (1991), S. 890-896 
    Details
    ISSN: 1573-9325
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract From the unique positions of ergodynamic theory of scattered failure (damageability) we examine for the first time and solve the problem of initiating and propagating a crack. We have also derived experimentally validated kinetic equations for a crack under static and cyclical loads. We have established the relationship between the rate of crack propagation and the structure of the materials and the loading conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00772492
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  • 8
    Electronic Resource
    Electronic Resource
    A thermodynamic theory of the mechanical strength and failure of a solid body (1971)
    Springer
    Strength of materials 3 (1971), S. 1290-1293 
    Details
    ISSN: 1573-9325
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01530901
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  • 9
    Electronic Resource
    Electronic Resource
    Prediction of the residual life of machine parts (1987)
    Springer
    Strength of materials 19 (1987), S. 1166-1170 
    Details
    ISSN: 1573-9325
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01523307
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  • 10
    Electronic Resource
    Electronic Resource
    Thermodynamic method of estimating long-term strength (1972)
    Springer
    Strength of materials 4 (1972), S. 1076-1079 
    Details
    ISSN: 1573-9325
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01529581
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