The Staebler-Wronski effect in a-Si:H films implanted with boron and phosphorus ions
The Staebler-Wronski effect in a-Si:H films implanted with boron and phosphorus ions
I.A. Kurova, I.P. Akimchenko, K.B. Chitaya
It is established in experiments in a-Si:H films implanted with boron and phosphorus ions that with total concentration of the implaned B and P ions $N_B$ and $N_Р$ of less than $5\cdot 10^{19}$ cm$^{-3}$ the Staebler-Wronski effect, a change in the dark conductivity and its energy of activation after illumination of the films by white light, is observed. At $N_P, N_B>5\cdot 10^{19}$ cm$^{-3}$ there is no such effect. The nature of the observed patterns is discussed.
Show AbstractResonance phenomena with the effect of $CO_2$-laser radiation on a germanium surface
Resonance phenomena with the effect of $CO_2$-laser radiation on a germanium surface
A.V. Zoteev, V.F. Kiselev
Mass spectrometry is used to investigate desorption of isolated molecules from the surface of germanium and oxidized germanium stimulated by infrared radiation from a $CO_2$-laser. A comparison with the process of thermodesorption is performed and proposals are advanced about the resonance effects in the mechanism of photodesorption.
Show AbstractChange in the nature of exchange interactions in Heusler alloys with a replacement of Co for Cu
Change in the nature of exchange interactions in Heusler alloys with a replacement of Co for Cu
P.N. Stetsenko, V.V. Surikov, A.I. Laskin
RCCI (the preasymptotic form) and Caroli-Blandin models are used for calculating the Fermi wave vector and the exchange integrals in $Cu_2MnAl$ and $Co_2MnAl$ alloys. The experimentally acquired values of the spin polarizations for the first and second coordinational spheres serve as the initial information. It is shown that the basic role in the $Cu_2MnAl$ alloy is played by a mechanism of d-resonance scattering, while it is played by sd-exchange in the $Co_2MnAl$ alloy.
Show AbstractSpectral characteristics of antiferromagnetic resonance of MnVG garnet
Spectral characteristics of antiferromagnetic resonance of MnVG garnet
M.V. Levanidov, V.I. Sokolov
Antiferromagnetic resonance is detected in an $NaCa_2Mn_2V_3O_{12}$ crystal which contains octahedral $Mn^{2+}$ ions. It is established that there is an isotropic slot ($\Delta ^2$) in the antiferromagnetic resonance spectrum of the crystal, whose value is maximal at T $\sim$ 7K and is sharply reduced with a reduction in temperature. The results of measurements of the static magnetostriction of the same crystal justifies the hypothesis that $\Delta ^2$ is not related to the magnetoelastic interaction. The possible mechanism of the observed characteristics of the antiferromagnetic resonance in this crystal is discussed. This is interaction of the Jahn-Teller admixtures of the $Mn^{3+}$ ions in the crystal.
Show AbstractThe potential for dialog when reducing measurements
The potential for dialog when reducing measurements
B.I. Volkov, Yu.P. Pytev, D.V. Yudin
The basic mathematical questions which come up when solving problems of interpretation and processing of experimental data in a dialog with a researcher using the rich scientific experience and specific additional information about the research object, which the scientist possesses are examined.
Show AbstractUsing a dual variable method to integrate non-Hamiltonian systems
Using a dual variable method to integrate non-Hamiltonian systems
Yu.G. Pavlenko, S.I. Zelenskii
It is shown that a variable doubling method makes it pcssible to solve arbitrary non-Hamiltonian systems of equations on the basis of the canonical perturbation theory.
Show AbstractSynthesis of directed couplers based on linearization of a direct problem operator
Synthesis of directed couplers based on linearization of a direct problem operator
V.A. Gerasimov, S.Yu. Kovenskii, A.V. Tikhonravov
An effective approximate method is proposed for synthesizing directed couplers with smooth wave resistances which is based on linearization of the direct problem operator. The equation acquired in this case is thought of as an equation with an imprecisely assigned operator and a right part and is solved using A.N. Tikhonov's regularization method.
Show AbstractResonance photoionization in a region of $2p^53s^{22}P_J$-states of sodium: angular distributions and polarization of photoelectrons with finite energy resolution
Resonance photoionization in a region of $2p^53s^{22}P_J$-states of sodium: angular distributions and polarization of photoelectrons with finite energy resolution
A.N. Grum-Grzhimailo, B.Zhadamba
The effect of the energy resolution on the angular distribution and polarization of photoelectrons in a region of two closely arrayed autoionization states is analyzed in an example of a $2p^53s^{22}P_J$ doublet of a sodium atom. The resonances in the energy relation of the coefficient of angular anisotropy and polarization of photoelectrons have a width which is different from the decay width of the autoionization state and are shifted with respect to the position of this state, General relations for the width and the shift are acquired.
Show AbstractNucleon branches and a half-line mechanism for decay of the giant resonance of a $^{23}Na$ nucleus
Nucleon branches and a half-line mechanism for decay of the giant resonance of a $^{23}Na$ nucleus
A.S. Gabelko, K.M. Irgashev, B.S. Ishkhanov, I.M. Kapitonov, I.M. Piskarev
A technique of relative widths of decay is used to analyze experimental, partial photonucleonic cross sections for a $^{23}Na$ nucleus. The probability of a half-line mechanism for decay of dipole giant resonance cf this nucleus and individual photonucleonic channels is determined.
Show AbstractReordering of the structure of intrinsic modes with their parametric excitation in a plasma-beam waveguide
Reordering of the structure of intrinsic modes with their parametric excitation in a plasma-beam waveguide
M.V. Kuzelev, V.A. Panin
The work is dedicated to a nonlinear theory of parametric beam-plasma instabilities with consideration of distortion of the transvers structure and polarization of the waveguide modes. Analytical solutions are acquired of nonlinear equations which are written with a precision to cubic members. The role of reordering of a waveguide mode structure at the instability saturation stage is evaluated.
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