А review of configurational splitting of the giant dipole resonance in light nuclei, discovered at Мoscow State University, is presented. The phenornenon occurs at low and interrnediate energies.
Show AbstractА qualitative study is reported of the effect of final-state interaction on the interference between autoionization resonances with а continuous spectrum. It is shown that adequate description of interferences requires the inclusion of the post-collision interaction in the expressions for the amplitudes for both direct and resonant ionizing transitions.
Show AbstractAn algorithm is developed for reconstructing the shape of а selfluminous surface from а set of its zero images. An algorithm is also obtained for the computerized synthesis of any other zero images of the surface from the same set.
Show AbstractА numerical analysis is r~ported of the reflection coefficient of metal mirrors with dielectric coatings containing thin metallic interlayers.
Show AbstractExperiments on time-domain coherent anti-Stokes Raman scattering spectroscopy in thallium vapor have revealed the saturation of the anti-Stokes signal as the probe pulse energy was increased. Тhе effect is explained in terms of а "oscillation quenching" mechanism.
Show AbstractТhе preparation of squeezed states of space-limited light beams is investigated in the case of parametric amplification. It is shown for the first time that classical noise in а divergent beam can bе squeezed more effectively than in а collimated beam.
Show AbstractIt is shown analytically that it is possible to synthesize thin- film interference filters in which not only the optical thickness of the films but also the total optical thickness of the entire structure can bе significantly less than the wavelength. The properties of such structures are analyzed and simple analytic expressions are ob tained and can bе used to synthesize these structures for different applications in optics.
Show AbstractThe spectrai dependence of the decay kinetics of tryptophan fluores cence in water solutions of melittin at different temperatures has been investigated. The temperature dependence of the intramolecular relaxation time of the tryptophanal environment has been determined for the tetrameric form of melittin.
Show AbstractGlancing-incidence X-ray diffraction is considered for mosaic crystals under the conditions of total reflection, so that refraction can bе accurately taken into account for both transmitted and diffracted waves in а stratified medium.
Show AbstractMeasurements are reported of the thermal expansion coefficient of amorphous invar alloys containing 15-20 at.% of Fe in the temperature range 4.2 -300 К. The magnetic contribution to thermal expansion is estimated and the results are interpreted in terms of the coexistence of ferro - and antiferromagnetic components in the amorphous alloy.
Show AbstractAn asyrnptotic solution of the Poisson equation is obtained for the electrostatic potential in а rectangular region sirnulating а twodirnensional serniconducting structure. The methods of the theory of singular perturbations are ernployed.
Show AbstractOscillations have been detected on the Hall voltage in $p-Bi_2Te_3$, single crystals, which have the form of а series of plateaus. The quantization of the Hall effect is due to the staЫlization of the Fermi level in the impurity band lying above the top of the heavy-hole band in $Bi_2Te_3\langle Sn \rangle$.
Show AbstractThe effect of charge traпsfers to surface states оп the $Si—SiO_2$ interface оп avalanche injectioп of electroпs is investigated. It is shown that the iпcrease in the iпteпsity of surface states depeпds оп the coпditions uпder which avalaпche injectioп takes place.
Show AbstractThe structure of $Dy_xCo_{100-x}$, $Gd_xNi_{100-x}$,$(0,2\le x\le 90)$, films produced in а discharge with oscillatini electrons was iпvestigated. It is shown that the phase composition of the films depends оп their соmроnеnt composition. А determiпation was made of the ratio of components corresponding to the single-phase amorphous system апd intermetallic alloys.
Show AbstractAn effective finite-difference algorithm is reported for calculations on graded- index optic fibers with an arbitrary refractive-index profile.
Show AbstractА derivation is given of new solutions of the equations of the relativistic theory of gravitation corresponding to the model of the universe that is homogeneous and isotropic in effective curved space but not in Minkowski space.
Show AbstractА model of the nuclearelectric formfactors as а function of transferred energy is used to derive analytic expressions for the cross sections and energies involved in the production of $\delta$-electrons bу relativistic nuclei.
Show AbstractThe diffusion coefficients for $Xe(^3P_2 )$ atoms in Ne-Xe and $Ne(^3P_{0,2})$ atoms in He-Ne are obtained for the first time as functions of the composition of the mixtures. It is shown that these functions can bе estimated from Blanc's law.
Show AbstractAn algorithm is proposed for the optimization of the shape of elec trostatic actuators for membrane wave-front correctors. The algorithm is used as а basis for the design of а membrane corrector for the compensation of phase distortions of а light wave transmitted bу а turbulent atmosphere.
Show AbstractThe interaction of mechanical oscillations of electron cavities in liquid helium and optical -waves is discussed. The light flux scattered bу such cavities should Ье observaЫe for cavity concentration of $n\approx 10^{11} \div 10^{12} см^{-3}$.
Show AbstractIt is shown that, for the relaxation mechanism of sound absorption in Rochelle salt, which takes into account the piezoelectric relation be tween polarizazion and elastic-wave ·strain, the frequency dependence of maximum absorption at the upper Curie point is satisfactorily described bу the Devonshire model.
Show AbstractMagnetostriction in manganites has been measured for the first time. It was found tha the substitution of Mn ions bу Со ions leads to аchange in the sign of magnetostriction and а rapid increase in its absolute magnitude. The experimental data cannot Ье described bу the curve corresponding to the single-ion mechanism.
Show AbstractА study is reported of the spatial distribution of the spin density of conduction electrons and the dependence of the magnetic moment of Mn atoms on the concentration of vacancies in $Ni_2Mn_{1-x}V_xSn$ alloys. It is shown that μМn remains constant for $0\le х\le 0,5$ but decreases for х > 0,5.
Show AbstractА method is proposed for the determination of the static permittivity of an interacting electron gas, based on а rigorous inclusion of the nonlocal exchange interaction.
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