On the influence of fluctuations of close environment of molecules in solvents on theirs absorption spectra
On the influence of fluctuations of close environment of molecules in solvents on theirs absorption spectra
B.D. Rуzhikоv, P.K. Senatоrоv
A method for making allowance for the inhomogeneit1es of the close environment of solute molecules on their absorption spectra is suggested. The total molecular energy is written in form of a sum of' the molecule's internal energy and the potential energy of interaction with the close environment. It is assumed that fluctuations of the second component obey a normal distribution, whereas those of the first can take only positive values. Results of using this method for reconstructing the absorption spectrum by rhodamine 6G molecules are presented.
Show AbstractStability boundaries of stationar regimes of multicontour generator with delay
Stability boundaries of stationar regimes of multicontour generator with delay
G.P. Minina
Stability limits of a multiresonator oscillator with lag in the nonlinear element are obtained in simple analytic form. The effect of frequency off - resonance of the individual resonators is incorporated. The dependence of the stability limits on the parameters of the multiresonator system is examined. It is shown that, under certain conditions, the presence of a fixed lag can improve the system's performance.
Show AbstractThe experimental determination of absorption coefficient of nitrogen plasma at 2820 A
The experimental determination of absorption coefficient of nitrogen plasma at 2820 A
M. Marenchak, A.I. Sokolov
Experiments for determining the absorption coefficient of nitrogen plasma at 2820°A at temperatures from 8000 to 12,000°K are described. It is assumed, by comparing experimental and analytic values, that a stable N$^{-}$ ion in the $^{3}$Р state may form in the nitrogen plasma. The probability of decay of N$^{-}$($^{3}$P) without absorption of a photon, in the radiation spectrum, of a nonthermal component, increases with rising temperature.
Show AbstractTensor wave equation. Movement in field of flat electromagnetic wave
Tensor wave equation. Movement in field of flat electromagnetic wave
В.M. Barbashov, A.A. Leonovich
The problem of the motion of a tensor particle in an applied electromagnetic field is formulated. An exact solution for the motion of а particle in the field of a plane electromagnetic wave is obtained.
Show AbstractStatistical mechanics of relativistic plasma
Statistical mechanics of relativistic plasma
N.D. Naumov
A statistical theory is suggested for describing processes in relativistic plasma on the basis of the Klimontovich method. An equation of motion of the phase density of particles and oscillators of a field is obtained; averaging it one obtains a set of coupled equations for moments. Unlike previous work, the paper considers joint distribution functions for the field's particles and oscillators.
Show AbstractModernization of cyclotron of MIFI
Modernization of cyclotron of MIFI
L.A. Sarkisyan, I.D. Koshevoy, V.A. Kalita, V.S. Nikolaev, V.P. Zaykov, В.M. Popov, L.I. Vinogradova
The results of work which allowed to switch, in 1980, the cyclotron to the ion-energy modulation mode and to significantly raise the intensity of the accelerated and discharged beams, are described.
Show AbstractParametric amplification of light in dispersive medium under multi-mode pumping
Parametric amplification of light in dispersive medium under multi-mode pumping
Yu.E. D'yakov, S.Yu. Nikitin
Three - frequency $(ω_{1}+ω_{2}=ω_{p})$ parametric interaction between nonmono-chromatic waves is considered under conditions when the effect of dispersion on the no - load wave($ω_{2}$)is significantly greater than on the signal wave ($ω_{1}$). Conditions under which the no - load wave can be regarded as monochromatic are determined. The roots of the characteristic equation are investigated in this approximation, and an exact solution is obtained of abbreviated equations for amplitudes with consideration of boundary conditions.
Show AbstractColour centers in barium sulphide phosphors
Colour centers in barium sulphide phosphors
E.P. Efanova, V.V. Mikhaylin
Исследованы спектры ИК-стимуляции BaS-фосфоров. На основании сравнения полученных экспериментальных данных с расчетами по эмпирическим формулам предполагается, что вся структура в спектрах ИК-стимуляции связана с электронными центрами окраски, образованными собственными дефектами BaS.
Show AbstractOn the regularitive algorithm for the solution of some inverse problem of the heat conductivity
On the regularitive algorithm for the solution of some inverse problem of the heat conductivity
A.N. Tikhоnоv, V.В. Glaskо, N.I. Кulik
Дается формулировка и обоснование специального регулярйзирующего алгоритма для решения обратных задач, связанных с моделированием процесса индукционной закалки стальных образцов. Приводятся результаты численного решения задач об определении плотности источников и закона теплообмена на поверхности образца, а также результаты моделирования процесса в целом, позволяющие выбрать оптимальный режим.
Show AbstractOn calculation of electron energy distribution function in direct-current and high-frequency electric field
On calculation of electron energy distribution function in direct-current and high-frequency electric field
A.P. Ershоv, V.A. Dovzhenko, A.A. Kuzovnikov
Предлагается численный метод расчета функции распределения электронов по энергиям в однородных постоянном и высокочастотном полях, основанный на сведении уравнения для функции распределения к рекуррентной последовательности линейных краевых задач. Рассмотрена роль электрон-ионных столкновений, и показано, что неучет этого процесса при одновременном учете электрон-электронных столкновений приводит к грубым ошибкам в коэффициентах переноса. Иллюстрируется влияние различных предположений о виде интеграла неупругих столкновений на результаты расчета в постоянном и высокочастотном полях. Представлены результаты численного расчета в плазме Хе.
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