Radiative decay of a massive neutrino in a magnetized electron-positron gas
Radiative decay of a massive neutrino in a magnetized electron-positron gas
V.Ch. Zhukovskii, P.A. Eminov, K.G. Levchenko, V.A. Vshivtsev
The probability of radiative decay of the massive Dirac neutrino $\nu_i\to\nu_j+\gamma$ in a magnetized electron-positron gas has been calculated. A considerable enhancement of the decay rate in the case of a superstrong magnetic field as compared to the free process in matter has been demonstrated to take place.
Show AbstractStability of laser array in-phase generation in cylindrical Talbot cavity
Stability of laser array in-phase generation in cylindrical Talbot cavity
V.P. Kandidov, A.V. Kondrat'ev
The in-phase generation mode of a closed laser array in a cylindrical Talbot cavity has been shown to be stable with respect to small perturbations in the form of higher-order collective modes.
Show AbstractRelaxation of microstresses in a deformed Pd-Er alloy after electrolytic saturation with hydrogen
Relaxation of microstresses in a deformed Pd-Er alloy after electrolytic saturation with hydrogen
V.M. Avdyukhina, A.A. Katsnel'son, N.A. Prokof'ev, G.P. Revkevich
Lattice parameters of a deformed Pd-Er alloy have been measured prior to saturating the sample hydrogen with subsequent degassing. Oriented microstresses were found to change partially during degassing. These changes had a nonmonotone character.
Show AbstractNonmonotone kinetics of $\alpha$-Si:H film conductivity variations under illumination at elevated temperature
Nonmonotone kinetics of $\alpha$-Si:H film conductivity variations under illumination at elevated temperature
I.A. Kurova, N.N. Ormont
Light intensity effect on the kinetics of dark conductivity ($\sigma_d$) variations during and after illumination has been studied for $\alpha$-Si:H films undoped and weakly doped with boron. The observed kinetics was nonmonotone at high and monotone at low light intensities. The influence oflight intensity on the kinetics of $\sigma_d$ variations can be explained by the formation and thermal annealing of photoinduced broken bonds and impurity activation and deactivation not involving light annealing of broken bonds.
Show AbstractОбразование пересыщенных твердых растворов и метастабильных фаз в системе Fe-Ti на разных стадиях механического сплавления
Образование пересыщенных твердых растворов и метастабильных фаз в системе Fe-Ti на разных стадиях механического сплавления
А.А. Новакова, О.В. Агладзе, Б.П. Тарасов, С.В. Свешников, Е.В. Лихушина
С целью получения нанокристаллического соединения FeTi в высокоэнергетической шаровой мельнице размалывалась эквиатомная смесь порошков Fe и Ti. Для анализа кинетики процесса механического сплавления, а также структурных и фазовых превращений, происходящих при этом, методами рентгеновской дифракции и мёссбауэровской спектроскопии исследовались образцы, полученные на разных этапах размола.
Show AbstractТрансмутация $^{90}$Sr под действием тормозного $\gamma$-излучения высокой интенсивности
Трансмутация $^{90}$Sr под действием тормозного $\gamma$-излучения высокой интенсивности
С. С. Бородина, Б. С. Ишханов, В. И. Мокеев
Разработан метод переработки радиоактивных изотопов, основанный на использовании пучков тормозных $\gamma$-квантов высокой интенсивности. Развит метод описания и выполнены расчеты временной эвлюции содержания и активности элементов трансмутационной цепочки $^{90}$Sr. Определена необходимая интенсивность тока электронов для эффективной переработки изотопа $^{90}$Sr при фиксированном времени облучения и энергии электронов.
Show AbstractFoundations of possibility theory. Methods of optimal estimation and decision making. 4. Maximal extension of possibility
Foundations of possibility theory. Methods of optimal estimation and decision making. 4. Maximal extension of possibility
Yu.P. Pyt'ev
It is shown that a possibility $P(\cdot): \mathcal{A}\rightarrow[0,1]$ can always be extended from an arbitrary $\sigma$-algebra $\mathcal{A}$ of subsets of $X$ to the algebra $\mathcal{P}(X)$ of all subsets of $X$ with preservation of all properties of the possibility, and that a measure $p(\cdot): \mathcal{L}(X)\rightarrow[0,1]$ specifying a possibility of fuzzy events can be extended with preservation of its properties to the class of all functions $X\rightarrow[0,1]$.
Show AbstractSpectral problem for the radial Schr$\stackrel{..}{o}$dinger equation with confining-type potentials
Spectral problem for the radial Schr$\stackrel{..}{o}$dinger equation with confining-type potentials
A.S. Vshivtsev$^1$, A.V. Prokopov$^2$, V.N. Sorokin$^1$, A.V. Tatarintsev$^1$
A procedure based on the generalized integral transform method is applied to determining energy spectra for a large class of radial Schr$\stackrel{..}{o}$dinger-type equations. This procedure is shown to be usefully employed in a number of known potentials. Moreover, it yields essentially new analytical results for such significant potentials as the Cornell potential important for the hadron physics.
Show AbstractAccount of metal structure periodicity in description of surface electron gas properties in terms of multiparticle density functionals
Account of metal structure periodicity in description of surface electron gas properties in terms of multiparticle density functionals
O.S. Erkovich, A.M. Popova
The electron gas spatial distribution near a metal surface is analyzed subject to the crystal lattice periodic structure. Within the formalism of multiparticle density functionals, an analytic expression for the two-particle density function of electron gas in a periodic potential is derived. These results can be used for calculating the electron gas characteristics in solids.
Show AbstractParticular solutions to nonlinear Schr$\stackrel{..}{o}$dinger-type equations of special form
Particular solutions to nonlinear Schr$\stackrel{..}{o}$dinger-type equations of special form
E.G. Barinova, A.G. Kornienko, A.R. Frenkin, G.A. Chizhov
Nonexponential solutions to one-dimensional nonlinear Schr$\stackrel{..}{o}$dinger-type equations of special form derived by the quadrature method are studied. For the first time examples of analytic solutions to some types of these equations are given.
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