Spectral methods of determining acousto-optical diffraction bу а bounded sound beam
Spectral methods of determining acousto-optical diffraction bу а bounded sound beam
M.А. Voronova and V.N. Parygin
The Bragg diffraction problem is solved for а bounded sound beam, using а new method employing а four- dimensional spectral representation of the light and sound beams.
Show AbstractRaman scattering of light in $\alpha$- quartz exposed to small doses of reactor and $\gamma$ - radiation
Raman scattering of light in $\alpha$- quartz exposed to small doses of reactor and $\gamma$ - radiation
L.Р. Avakyants, D.F. Keselev, and М.М. Firsova
The use of modern techniques in the investigation of Raman scattering in $\alpha$- quartz exposed to small reactor doses was used to separate the influence of neutron and $\gamma$ - components on the spectrum and to demonstrate the presence of а small frequency shift of the Raman lines.
Show AbstractMirrors with а 180° phase difference at oblique incidence
Mirrors with а 180° phase difference at oblique incidence
N.V. Grishina, А.V. Tikhonravov, and N.Е. Shapkina
The synthesis of reflecting coatings with а 180° phase difference between the s and р cornponents of the reflected field at an angle of incidence of 45° in the wavelength range $\Delta \lambda /\lambda=\pm 5 \%$ is discussed. Exarnples of synthesized systerns are reproduced.
Show AbstractPhase transitions and the magma formation problem
Phase transitions and the magma formation problem
М.V. Avdulov
Periodic temperature variations are accompanied bу а separation of the Earth's mantle into mineralogical fractions at temperatures below the solidus point of rock. А physical model is put forward for the formation of magmatic melts of different chemical compositions.
Show AbstractInelastic scattering of X-rays in the case of diffraction bу crystals with а damaged surface layer
Inelastic scattering of X-rays in the case of diffraction bу crystals with а damaged surface layer
V.А. Bushuev and Т. Сhen
А dynarnic theory of Cornpton and therrnal diffusion scattering during the diffraction of X-rays Ьу perfect crystals with an epitaxial filrn on the surface is developed.
Show AbstractSolitions in а domain wall
Solitions in а domain wall
L.I. Antonov, А.N. Matveev, and Р.А. Polyakov
It is shown that а nonlinear dynamic structure such as а soliton can appear in the domain wall of а massive magnetic sample.
Show AbstractEffect of all- sided pressure on the magnetization of single crygtal terbium
Effect of all- sided pressure on the magnetization of single crygtal terbium
S.А. Nikitin and R.V. Bezdushnyi
The effect of all-sided pressure on the rnagnetization of single-crystal terЫurn is investigated. Giant volurne magnetostriction, $\sim 650\cdot 10^{-6}$, is found. The dependence of the magnetic anisotropy constant $K_6$ on pressure is found to bе described bу а single-ion theory of magnetic anisotropy.
Show AbstractDefect formation in GaAs and GaAsP under the influence of the excimer laser radiation
Defect formation in GaAs and GaAsP under the influence of the excimer laser radiation
А.I. Efimova, Р.К. Kashkarov, М.S. Dzhidzhoev, and V.К. Popov
The effect of excimer-laser pulses on the photoluminescent properties of GaAs and GaAsP was investigated. It was shown that, depending on the initial defects present in the samples, the laser pulses give rise to the generation of annihilation of radiationless recombination centers.
Show AbstractReduction problems in the case of an unknown correlation operator
Reduction problems in the case of an unknown correlation operator
Yu.Р. Pyt'evand M.L. Serdobol'skaya
An analysis is given of the reduction of experimental data for models with an а priori unknown correlation operator representing measurement uncertainties.
Show AbstractDeterioration in temporal coherence of а light pulse with random spatial modul ation in the case of time-dependent thermal self- interaction
Deterioration in temporal coherence of а light pulse with random spatial modul ation in the case of time-dependent thermal self- interaction
V.А. Aleshkevich, G.D. Kozhoridze, and А.N. Matveev
An analytic study is reported of the deterioration in the temporal coherence of а powerful light pulse that is randomly modulated in space during time-dependent thermal self-interaction. Expressions are obtained for the beam width, radius, and coherent time.
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