106 research outputs found
Analytical calculation of output Stokes pulse energy at intracavity Raman conversion in Q-switched lasers
Optimization of stokes pulse characteristics in Q-switched lasers with intracavity Raman conversion
Analytical solution for pulse evolution in Q-switched lasers with intracavity Raman conversion
Laser in the axial electric field as a tool to search for P-, T- invariance violation
We consider rotation of polarization plane of the laser light when a gas
laser is placed in a longitudinal electric field (10~kV/cm). It is shown that
residual anisotropy of the laser cavity 10^{-6} and the sensitivity to the
angle of polarization plane rotation about 10^{-11} -10^{-12} rad allows one to
measure an electron EDM with the sensitivity about 10^{-30} e cm.Comment: 12 page
thermoluminescence in lif crystals and the role of impurities
Eight nominally pure lithium fluoride crystals, obtained from a single LiF crystal containing less than 100 ppm impurities, were irradiated by gamma-rays from a 60 Co source at room temperature, with doses from 8.4 to 2.5 x 10 5 Gy, but one at -60 °C. Optical density measurements were performed to investigate the radiation-induced color centres (CCs) and to evaluate their concentrations. Thermoluminescence (TL) glow curves were collected and simulated by a first-order kinetics approach, and from the best-fit procedure ten glow peaks (GPs) spanning from 100 to 450 °C were highlighted. A comparative analysis of GP intensities and CC concentrations as a function of the irradiation dose has questioned their association as obtained in previous measurements, showing the impurities, less than 10 18 cm -3 , still playing a predominant role in TL spectra. New measurements on LiF crystals more pure, at least an order of magnitude, are required to establish for sure the association of GPs to CCs
Plasmon oscillations in ellipsoid nanoparticles: beyond dipole approximation
The plasmon oscillations of a metallic triaxial ellipsoid nanoparticle have
been studied within the framework of the quasistatic approximation. A general
method has been proposed for finding the analytical expressions describing the
potential and frequencies of the plasmon oscillations of an arbitrary
multipolarity order. The analytical expressions have been derived for an
electric potential and plasmon oscillation frequencies of the first 24 modes.
Other higher orders plasmon modes are investigated numerically.Comment: 33 pages, 12 figure
INFLUENCE OF SILVER SURFACE STRUCTURE ON LUMINESCENCE CHARACTERISTICS OF EUROPIUM DOPED POLYMER FILMS
The luminesceuce characteristics of Eu 3+ ions in Eu(ΝO 3 ) 3 . 6Η2O salt contained in polymer films coating the silver metallic surfaces were studied. The surfaces were specially prepared to consist of silver tip arrays with the height of tips in micron and surface density in 10 -8 cm -2 ranges. The eval-. uation of enhancement per one europium ion gave a value 3.5 x 10 2 for one polymer layer coating of tip array silver surface in comparison with the case of glass substrate coating
Diffusion and aggregation of subsurface radiation defects in lithium fluoride nanocrystals
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