Numerical modeling of anomalously small damping of electric waves in a planar corrugated waveguide
Numerical modeling of anomalously small damping of electric waves in a planar corrugated waveguide
V.P. Modenov, A.V. Magataev
We present the results of a numerical experiment on a computer, carried out using an algorithm for the calculation of complex transverse wave numbers of the dispersion equation. These results confirm the earlier conclusions of an analytical theory about the existence of regimes with anomalously small damping of the $E_{0n}$-waves in a planar corrugated waveguide.
Show AbstractNoninvariance of vacuum in gage models
Noninvariance of vacuum in gage models
G.A. Sardanashvili, A.V. Subbotin
In the formalism of C* algebras, we construct an operator for the transition between nonequivalent vacua. This makes it possible to prove a number of properties of the field models with spontaneous symmetry breaking.
Show AbstractA study of the parameters of traps in amorphous hydrogenated silicon using the volt-farad characteristics
A study of the parameters of traps in amorphous hydrogenated silicon using the volt-farad characteristics
A.N. Nevzorov, Yu.A. Zarif'yants, V.O. Abramov, V.E. Drozd
We study the localized states in amorphous hydrogenated silicon, obtained by HF discharge in monosilane, by the method of volt-farad characteristics of a Schottky diode in the frequency range 1-10 Hz. We determine the density of states for zero bias ($1,5\cdot 10^{17} ev^{-1}\cdot cm^{-3}$). This quantity agrees with the results of other methods. By comparing the experimental frequency dependence of the capacitance with the theoretical curve using two adjustable parameters, we determine the effective electron capture cross section of the trap ($10^{-14} cm^2$).
Show AbstractThe generation spectrum of TEA $CO_2$ laser with an intraresonator absorber
The generation spectrum of TEA $CO_2$ laser with an intraresonator absorber
A.B. Vasil'ev, A.I. Fedoseev
We discuss the possibility of obtaining a simultaneous generation on a number of vibrational-rotational levels of three different bands of the $CO_2$ molecule in the TEA laser. The tuning of the line is carried out by changing the temperature of the intraresonator cell with the carbon-dioxide gas.
Show AbstractThe effect of replacement of Mn ions by Fe ions on the metal-semiconductor transition in manganites
The effect of replacement of Mn ions by Fe ions on the metal-semiconductor transition in manganites
E.P. Svirina, L.P. Shlyakhina, M.M. Lukina, V. Ntakhomvukiie (Burund)
We study the electrical resistance $\rho$, the thermoelectric force $\alpha$, the magnetoresistance $\Delta\rho/\rho$, the spontaneous magnetization $\sigma_s$ and the Curie temperature $Т_c$ of monocrystalline manganites $La_{0,6}Pb_{0,4}Fe_yMn_{1-y}O_3$ for y = 0; 0.10; 0.15, and 0.22 in the temperature range from 80 to 800 K and in magnetic fields up to 14 kOe. It is established that the manganites under study are magnetic semiconductors whose width of the forbidden gap is, in order of magnitude, comparable with the energy of the exchange interaction. This causes a metal-semiconductor transition in the neighborhood of the Curie temperature. The replacement of Mn ions by the Fe ions leads to an increase of $\rho$ and of the activation energy $\Delta E$, and to a decrease of the Curie temperature $Т_c$ and of the spontaneous magnetization.
Show AbstractAngular distribution of gamma quanta in the deexcitation of nuclei in diffraction production of particles at nuclei
Angular distribution of gamma quanta in the deexcitation of nuclei in diffraction production of particles at nuclei
V.L. Korotkikh, N.I. Starkov
We obtain the matrix elements of the spin density matrix of the nucleus $^{12}С$ in the state 2+, 4.44 MeV, excited in the processes $(\pi, \pi')$ and $(\pi, 3\pi)$ at momentum 40 GeV/sec. We determine the regions of the transferred momentum where the angular distribution of the gamma quanta from the de-excited level is most sensitive to the dynamics of the process.
Show AbstractThe measurement of negative-ion concentration in the plasma of non-self-maintained Townsend discharge and microwave discharge
The measurement of negative-ion concentration in the plasma of non-self-maintained Townsend discharge and microwave discharge
A.S. Zarin, V.N. Kulikov, V.E. Mitsuk
We present the results of direct measurements of the ratio of concentrations of the negative ions and electrons in a mierowave discharge at pressure p = 0.1 Torr, and in a non-self-maintained Townsend discharge at pressure p = 50-760 Torr. The method of measurement is based on the introduction of a high-frequency filter in the gas during the application of a weak diagnostic constant field.
Show AbstractRadiation of stationary sources of magnetic field in nonuniformly moving media
Radiation of stationary sources of magnetic field in nonuniformly moving media
V.A. Davydov
We consider the radiation of stationary sources of magnetic field in a slowly moving medium whose velocity varies with time. The obtained expressions for the angular and spectral distributions of the emitted energy are used to calculate the radiation of a magnetic dipole and of a constant current.
Show AbstractThe effect of heavy-particle interaction on the behavior of the double differential ionization cross sections
The effect of heavy-particle interaction on the behavior of the double differential ionization cross sections
A.L. Godunov, Sh.D. Kunikeev, V.S. Senashenko
Using an earlier method based on the three-particle Faddeev equations modified for the Coulomb potentials, we study the effect of interaction of the incident particles with the nucleus of the target atom on the double differential inonization cross sections. It is shown on the example of the helium-atom ionization that taking into account this interaction improves the agreement of the theory with experiment in a wide range of energies of the colliding particles.
Show AbstractThe effect of constant electromagnetic field on the beta decay with small energy release
The effect of constant electromagnetic field on the beta decay with small energy release
I.M. Ternov, V.G. Zhulego, V.N. Rodionov, O.F. Dorofeev, A.E. Lobanov, V.K. Perez-Fernandez
We study the effect of external constant crossed field on the behavior of the nuclear beta decay for arbitrary values of the released energy. We compare our results with the case when the beta decay takes place under the influence of a strong electromagnetic wave.
Show Abstract