Electroluminescent resonance

The non-monotonous course of electroluminescent emission as a function of frequency with relative maxima for 16 KHz and 25 KHz is found experimentally. The phenomenon measured was expounded as electroluminescent resonance (Harman G. G.: J. Electrochem. Soc.104 (1957), 114C.) and its theory is presented.The measurements were performed in the Department of Physics of the Institute of Mechanical and Textile Engineering in Liberec.     

Analytical expressions for the electrodynamic characteristics of the fundamental mode of a microstrip line

Institute of Radio Engineering, Electronics, and Automation, Moscow. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 34, No. 5, pp. 601–603, May, 1991.     

Passage of radio waves through a stream of low-temperature turbulent plasma

Institute of Radio Engineering and Electronics, Academy of Sciences of the USSR. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 33, No. 7, pp. 804–812, July, 1990.     

On excitation of a near-surface waveguide by a high-elevation source

Institute of Radio Engineering and Electronics, Russian Academy of Sciences Moscow. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 38, No. 9, pp. 913–919, September, 1995.     

Active,two-element,microwave interferometry of the sea surface

Institute of Radio Engineering and Electronics, Academy of Sciences of the USSR. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 31, No. 3, pp. 263–273, March, 1988.     

Radiation model of the system scattering layer + rough surface in the microwave range

Institute of Radio Engineering and Electronics, Academy of Sciences of the USSR. Translated from Izvestiya Vysshykh Uchebnykh Zavedenii, Radiofizika, Vol. 34, No. 4, pp. 472–476, April, 1991.     

A phase-locked oscillator with control-loop hysteresis

Moscow Institute for Radio Engineering, Electronics, and Automatics. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 34, No. 4, pp. 365–370, April, 1991.     

Modification to the minimal autonomous block method: The L-MAB method

Moscow Radio Engineering, Electronics, and Automatics Institute. Translated from Izvestiya Vysshikh Uchebnyk Zavedenii, Radiofizika, Vol. 33, No. 12, pp. 1380–1384, December, 1990.     

Frequency changes and refraction of radio waves propagating through the plasma around the sun

Institute of Radio Engineering and Electronics, Academy of Sciences of the USSR, Moscow. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 33, No. 9, pp. 1007–1012, September, 1990.     

A renormalization-group analysis for two unidirectionally coupled Feigenbaum systems at the hyperchaos threshold

Saratov Branch, Radio Engineering and Electronics Institute, USSR Academy of Sciences. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofisika, Vol. 33, No. 7, pp. 788–792, July, 1990.     

Using millimeter radio waves to probe the earth's atmosphere

Radio Engineering and Electronics Institute, Academy of Sciences of the USSR. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 32, No. 1, pp. 3–10, January, 1989.     

Luminescence of AgCl/Mn++ crystals

The temperature dependence of the luminescence spectra and kinetics, the excitation spectra, luminescence polarization, quantum yield of the integral luminescence and paramagnetic resonance of AgCl crystals doped with three concentrations of manganese ions at 77°K were measured and the results are discussed.The author expresses his gratitude to associate professor K. Vacek, Ph.D. for suggesting the work on the above problem and for his help. Thanks are also due to Dr. Krutina and Dr. Sroubek, of the Research Institute of Radio Engineering of the Czechoslovak Academy of Sciences, for enabling the measurement of the spectra of paramagnetic resonance to be carried out in their laboratory.     

Polarization fluctuations in a dipolar medium in an electrostatic field

Radio Engineering and Electronics Institute, Academy of Sciences of the USSR. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 32, No. 9, pp. 1113–1124, September, 1989.     

Temperature dependence of a gluon condensate in a model with a spherically symmetric non-Abelian field

The single-loop approximation is used to calculate a gluon condensate in an external spherically symmetric non-Abelian chromomagnetic field. Moscow Institute of Radio Engineering, Electronics, and Automation. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 7, pp. 18–22, July, 1997.     

Multistability and isomer classification and evolution in coupled feigenbaum systems

Saratov Affiliate of the Institute of Radio Engineering and Electronics, Academy of Sciences of the USSR. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 34, No. 1, pp. 35–39, January, 1991.     

Electron states of manganese luminescence centres in A1N

The energy spectrum of manganese luminescence centres in AlN was studied by means of excitation and emission spectra. Two regions of excitation were found: in the first region (from 40 000 to 31 000 cm^–1) excitation occurs as a result of transfer of energy from other impurity centres to the manganese centres; in the second region (from 26 000 to 17 000 cm^–1) the manganese centres are excited directly. In the excitation band with a peak at about 19 200 cm^–1 a phonon structure was observed having a temperature dependence analogous to that of the phonon structure of the emission band. The phonon energy at excitation differs from that at emission (_exc260 cm^–1, _em160 cm^–1). A scheme of electron-phonon levels of manganese centres in AlN is presented, and problems relating to the structure of these centres are discussed.Na Slovance 2, Praha 8, Czechoslovakia.The authors would like to thank Dr. L. Kratina and Dr. F. Kubec (Institute of Radio Engineering and Electronics, Czechoslovak Academy of Sciences), who kindly performed the EPR measurements, and to Professor M. Trlifaj and Dr. J. Pastrák for valuable discussions.     

Muon attachment in prompt fission of237Np

The probabilities of muon attachment to fission fragments in the prompt fission of²³⁷Np have been determined as a function of fragment mass and total kinetic energy release in a ( ^–,f ₁ f ₂ e ^–)-coincidence measurement. A strong dependence of the attachment probability on the fragment mass is observed. The experimental results are compared with theoretical predictions.It is a pleasure to thank Professor T. Mayer-Kuckuk for his co-operation in performing the project. We gratefully acknowledge the permanent support of Professor J.P. Blaser and his staff at PSI. We thank Professor R. Engfer, Dr. A.v.d. Schaaf, and Dr. H.C. Walter for their support in using the electron spectrometer SIN-DRUM I. We are thankful to Professor S. Polikanov (GSI) and to Dr. T. Krogulski (University of Warsaw, Bialystok) for intensive and fruitful discussions. We appreciate the collaboration of Professor W. Müller and Dr. J. Pauwels (CBNM-Mol) in the target preparation. This work has been funded by the German Federal Minister for Research and Technology (BMFT) under the contract number 06BN271 (PD, HH, FR, ChR, WS). We thank the following institutions and organisations for financial support: Foundation for Fundamental Research on Matter (FOM), the Netherlands Organisation of the Advancement of Pure Research (NWO) (JK, CdL, AT), and the Swiss National Foundation (SNF) (WB, EH; HP, DV). One of the authors is grateful for a fellowship granted by the Studienstiftung des deutschen Volkes (FR).     

A Conversation with Robert F. Christy – Part I

Robert F. Christy, Institute Professor of Theoretical Physics Emeritus at Caltech, recalls his childhood in British Columbia; his undergraduate years at the University of British Columbia; his graduate work with J. Robert Oppenheimer at Berkeley; and his work on the Manhattan Project, first with Enrico Fermi at the Metallurgical Laboratory of the University of Chicago and then as a member of the Theoretical Division at Los Alamos.     

Spectral problem for the Schrodinger equation with singular potential polynomial of even degree

For the stationary Schrodinger equation with singular potential U(x)=x^2r, where r∈Z₊, that describes situations associated with phase transition in quantum systems, discovery of symmetries can be used to reduce problems to algebraic problems for finding spectra. We construct analytic procedures for the convergent theory of perturbations to find eigenvalues for potentials of the indicated type. We discuss the fine structure of Bohr—Sommerfeld quantum conditions. Moscow State Institute of Radio Engineering, Electronics, and Automation. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 55–70, May, 1996.