Inversion caused Ьу а monochromatic external field in а homogeneously broadened two - level atom
Inversion caused Ьу а monochromatic external field in а homogeneously broadened two - level atom
В.А. Grishanin
The population difference has been calculated for the levels in а twolevel atom in а strong field with allowance for the inelastic interaction with the dephasing noise, which modulates the transition fre quency; а saturating field means that there is the frequency - difference range in which the stationary population difference is inverted because of the asyrnmetry in the absorption and emission of the quanta responsible for the dephasing.
Show AbstractThermooptic sound excitation at а boundary
Thermooptic sound excitation at а boundary
А.А. Karabutov and А.V. Uvarov
Thermooptic sound excitation has been examined for а boundary between transparent and absorbing heat- conducting media for any ratio of the acoustic impedances; тedia may bе classified as regards how the conductivity affects the generation. Spectral transfer functions are used. А detailed study has been таdе on strongly and weakly conducting тedia. The results еnаblе one to optimize opticoacoustic devices.
Show AbstractAsteroid motion near cornmensuraЬility 2:l and comparison of an analytic model with numerical integration
Asteroid motion near cornmensuraЬility 2:l and comparison of an analytic model with numerical integration
I.А. Gerasimov
Results from an earlier qualitative analysis on asteroid motion near 2:1 commensurability with Jupiter are compared with those from numerical integration for the equations governing the planar form in the circular restricted three- body problem.
Show AbstractThe light pseudoscalar boson contribution to the lepton's anomalous magnetic moment
The light pseudoscalar boson contribution to the lepton's anomalous magnetic moment
А.V. Averin, А.V. Borisov, and А.I. Studenikin
Calculations have been performed on the contribution from the 1.6 MeV pseudoscalar boson to the lepton g factor in а constant magnetic field. The magnitude is dependent on the lepton energy and field strength. Numerical estimates have been made and are compared with the contributions from weak interactions.
Show AbstractNematic liquid-crystal nonlinearity at 1-33 MHz
Nematic liquid-crystal nonlinearity at 1-33 MHz
F.V. Bulygin
Measruements have been made on the nonlinearity in the dielectric constant $\alpa$ for nematic liquid crystals in the range 1- 33 MHz: $\alpha=1,5\cdot 10^{-3} cm^3/erg$. The frequency dependence of $\alpha$ and tan $tg \delta$ has been determined, as well as the temperature dependence of $\alpha$ and $\epsilon$.
Show AbstractNumerical calculations and analytic estimates for the periodic, subharmonic, and chaotic ranges in the solution to the equations for а nonlinear oscillator subject to а harmonic external force
Numerical calculations and analytic estimates for the periodic, subharmonic, and chaotic ranges in the solution to the equations for а nonlinear oscillator subject to а harmonic external force
V.А. Makarov and А.V. Matveeva
А numerical study has been made on how absorption affects the size and position of the region in parameter space for an anharmonic oscillator subject to harmonic external force within which one gets period multiplication and dynamic chaos.
Show AbstractGain limiting for а picosecond- pulse burst with induced Raman scattering in potassium- gadolinium tungstate
Gain limiting for а picosecond- pulse burst with induced Raman scattering in potassium- gadolinium tungstate
Р. Heist and V.V. Shuvalov
It is found that the main restrictive factor is induced Raman scattering gain saturation in pumping а synchronous dye laser with the second harmonic of а picosecond laser based on $(KGd(WO_4)_2:Nd^{3+})$.
Show AbstractPolarization effects in nonlinear acoustic SH wave reflection
Polarization effects in nonlinear acoustic SH wave reflection
F.М. Severin and I.Yu. Solodov
The plane of polar ization for the second har monic is rotated in nonlinear shear SH wave reflection from solid interfaces.
Show AbstractElectron microscopy of ϒ- irradiated tungsten and molybdenum crystals
Electron microscopy of ϒ- irradiated tungsten and molybdenum crystals
V.А. Mashtakova, А.А. Salomatin, В.В. Shishkin, А.Р. Mamontov, N.N. Nikitenko, and I.Р. Chernov
Electron microscopy has been applied to surface structure and emissivity for polycrystalline tungsten carbide and molybdenum and also tungsten single crystals irradiated bу ϒ- rays, including how these characteristics vary on annealing.
Show AbstractThe spin-orientation phase diagram for the ($(Tb_{0,75} Ho_{0,25})_{1-x}Dy_xCo_2$ system
The spin-orientation phase diagram for the ($(Tb_{0,75} Ho_{0,25})_{1-x}Dy_xCo_2$ system
А.S. Ilyushin, М. Heniish, Н.А. Motaveh, А.А. А1i, and М.В. Karman
Low- temperature magnetometry and X- ray diffraction have been applied to $(Tb_{0,75} Ho_{0,25})_{1-x}Dy_xCo_2$ alloys; а spin- orientat ion phase diagram has been constructed.
Show Abstract