Phase transitions in thin layers of solid solutions К$_x$Na$_{1-x}$NO$_2$
Phase transitions in thin layers of solid solutions К$_x$Na$_{1-x}$NO$_2$
T.M. Hammad$^1$, A.A. Al-Tauyan$^1$, B.A. Strukov$^2$
Thin layers of the К$_x$Na$_{1-x}$NO$_2$ system have been obtained from a melt using special techniques. It is shown that a ferroelectric phase transition disappears when the content of К$^+$ ions reaches $x=0,1$. The dielectric constant, pyroelectric current and conductivity diminish with an increase of $x$. These data demonstrate that phase transition temperature goes down when the concentration of impurity grows. A phase diagram of the system under consideration has been plotted.
Show AbstractStability of triangular libration points in a nonlinear approximation in spatial restricted photogravitational elliptic three-body problem
Stability of triangular libration points in a nonlinear approximation in spatial restricted photogravitational elliptic three-body problem
A.Yu. Kochetkova
The stability regions of triangular libration points in a restricted photogravitational elliptic three-body problem have been first investigated in a nonlinear approximation.
Show AbstractФазовые переходы смачивания и предсмачивания в бинарной системе метанол-гептан
Фазовые переходы смачивания и предсмачивания в бинарной системе метанол-гептан
С.Г. Ильина, Э.А. Ионова, О.Г. Павлыгина
Представлены результаты измерения показателя преломления сосуществующих фаз на вертикальной стенке кюветы методом предельного угла. Обнаружено, что нижняя фаза системы метанол-гептан при температуре $T_w=44,\!3$ $^о$C образует смачивающий слой, вторгающийся между верхней фазой и стеклянной стенкой кюветы. Наблюдалось появление и исчезновение смачивающего слоя, а также переход предсмачивания.
Show AbstractПланетарная модель атома водорода на фоне флуктуаций вакуума: численный эксперимент
Планетарная модель атома водорода на фоне флуктуаций вакуума: численный эксперимент
А.В. Белинский
Гипотеза реального существования флуктуаций вакуума позволяет разрешить ряд важных задач в рамках классической электромагнитной теории, и в частности проблему стабильности атома водорода. Однако известные решения этой задачи противоречивы: Boyer и Puthoff исходят из круговой орбиты электрона, а Nelson показывает, что электрон колеблется в радиальном направлении и имеет нулевой орбитальный момент. Для проверки этих результатов проведен численный эксперимент, который подтвердил, что электрон действительно не падает на ядро, но вопрос о стабильности круговой орбиты в планетарной модели остается открытым.
Show AbstractOn consistency of the quantum and classical descriptions of a relativistic neutral particle with spin 1/2
On consistency of the quantum and classical descriptions of a relativistic neutral particle with spin 1/2
A.E. Lobanov, O.S. Pavlova
An operator that makes it possible to include in the Dirac equation solution the interaction between the neutral particle anomalous magnetic moment and the electromagnetic fields, for which the Bargmann-Michel-Telegdi equation gives the spin evolution exact description, is constructed.
Show AbstractExcitation of a waveguide with complex filling
Excitation of a waveguide with complex filling
A.N. Bogolyubov, A.L. Delitsyn, A.G. Sveshnikov
Excitation of a waveguide with a complex dielectric and magnetic filling is examined. A new scheme for the method of normal waves is suggested.
Show AbstractUltimate discrimination precision for the specified-energy states
Ultimate discrimination precision for the specified-energy states
I.I. Kaledin, F.Ya. Khalili
A problem of discriminating two quantum energy states is considered. It is shown that in this case the dynamic rigidity of the nondemolition energy measuring instrument does not affect the reliability of states discrimination.
Show AbstractCalculating the total high energy ion-atom scattering cross section in the eikonal approximation
Calculating the total high energy ion-atom scattering cross section in the eikonal approximation
V.A. Bilyk$^1$, V.L. Shablov$^1$, and Yu.V. Popov$^2$
A variant of the optical theorem application to calculating the total ion-atom scattering cross sections is proposed. Difficulties caused by an infinite zeroangle elastic scattering amplitude that arise in similar calculations in the eikonal approximation are eliminated by explicitly taking into account many-particle character of the scattering process.
Show AbstractThe initial- and final-state interaction effects in the production of $\pi^{-}\Delta^{++}$ particles on a proton by real and virtual photons
The initial- and final-state interaction effects in the production of $\pi^{-}\Delta^{++}$ particles on a proton by real and virtual photons
E.N. Golovach$^1$, V.S. Zamiralov$^1$, B.S. Ishkhanov$^1$, V.I. Mokeev$^1$, M.V. Osipenko$^1$, D.A. Rodionov$^1$, G.V. Fedotov$^1$, M. Battaglieri$^2$, A. Longhi$^2$, G. Ricco$^2$, M. Ripani$^2$, and M. Taiuti$^2$
Absorption effects in the initial and final states of the reaction $\gamma p \rightarrow \pi^{-}\Delta^{++}$ involving real and virtual photons are analyzed. From the condition of the experimental data best fit, the absorption parameters are obtained.
Show AbstractConcentration dependence of the fluorescence properties of oriented dye molecules in polymer films
Concentration dependence of the fluorescence properties of oriented dye molecules in polymer films
A.V. Grachev, V.I. Yuzhakov
A relationship between the orientation degree of dye molecules in stretched polyvinyl alcohol films and the concentration of these molecules is found. The electron excitation energy migration among the dye molecules in isotropic and oriented polymer matrices as a function of the molecule concentration is investigated. The results obtained can be attributed to partial reduction of the inhomogeneous spectral broadening of electron levels in luminescent molecules under the activator molecule orientation in the polymer matrix.
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