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BULLETIN OF THE LEBEDEV PHYISICS INSTITUTE
P.N.Lebedev Physics Institute of the Russian Academy of sciences

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10 number 1998 year

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1. Title:
DEPENDENCE OF THE CURRENT-VOLTAGE CHARACTERISTIC OF Si SURFACE-BARRIER NUCLEAR DETECTORS ON THE DETECTOR THICKNESS
Authors:
M.M. Salokhina.

Abstract:

2. Title:
EMISSION OF LIGHT CHARGED PARTICLES FROM FRAGMENTS OF URANIUM FISSION BY 153-MeV PROTONS AND 1700-MeV NEGATIVE PIONS
Authors:
G.E. Belovitskii, O.M. Shteingrad.

Abstract:

3. Title:
SCALING OF HARMONIC GENERATION IN A LASER-PRODUCED PLASMA
Authors:
K.N. Ovchinnikov, V.P. Silin.

Abstract:

4. Title:
ANALYSIS OF SPECIFIC FEATURES OF THE BEHAVIOR OF OPTICAL PHONONS IN THE Zn_xCd_1-xTe SOLID SOLUTION
Authors:
V.S. Vinogradov.

Abstract:

5. Title:
SPECIAL FEATURES OF LIGHT SCATTERING IN THE VICINITY OF THE PHASE-TRANSITION POINT IN LITHIUM TETRABORATE CRYSTALS
Authors:
V.N. Moiseenko, A.V. Vdovin, V.S. Gorelik, Y.V. Burak.

Abstract:

6. Title:
DYNAMIC EQUATION FOR THE MARGINAL DISTRIBUTION OF AN ARBITRARY n-DIMENSIONAL QUANTUM SYSTEM AND MARGINAL DISTRIBUTIONS OF STATIONARY STATES OF THE HYDROGEN ATOM
Authors:
Y.A. Korennoi, V.I. Manko.

Abstract:

7. Title:
MIGRATION THRESHOLD OF ELECTRONIC EXCITATIONS IN INHOMOGENEOUS POLYMER SYSTEMS: THE THEORETICAL MODEL AND SELECTIVE LASER SPECTROSCOPY OF THIN FILMS OF POLY(p-PHENYLENE)
Authors:
M.A. Drobizhev, V.P. Sakun, M.N. Sapozhnikov.

Abstract:
The dependence of the luminescence spectrum of thin films of poly(p-phenylene) on the excitation frequency ω_ex is studied at room temperature. It is found that upon laser excitation below a threshold frequency of 22060cm^-1, the excitation becomes selective and the luminescence spectrum begins to shift with ω_ex. The theoretical model is suggested which describes migration of electronic excitations in disordered polymer systems. The analytic expression is obtained which relates the localization threshold of excitations to the Forster radius and concentration of optical centers.