共查询到20条相似文献,搜索用时 15 毫秒
1.
M. M. Mogilevsky I. L. Moiseenko T. V. Romantsova J. Hanasz T. M. Burinskaya D. V. Chugunin 《JETP Letters》2011,93(6):326-329
The enhancement of auroral kilometric radiation near its lowest frequency has been detected in the polar edge of the auroral
zone in the POLRAD experiment with the INTERBALL-2 satellite. The difference between the local electron cyclotron frequency
and the lowest frequency of enhanced radiation is 8–20 kHz, indicating the closeness to the source of auroral kilometric radiation.
According to the detailed analysis of low-frequency auroral kilometric radiation, its amplitude is larger than the “background”
values by a factor of 20–70 and has amplitude modulation with characteristic periods of 40-60 s. The increase in the intensity
at low frequencies is attributed to the intersection of the source region by the satellite and the detection of waveguide
modes in it. 相似文献
2.
M. M. Mogilevsky T. V. Romantsova J. Hanasz T. M. Burinskaya R. Schreiber 《JETP Letters》2008,86(11):709-711
The radiation pattern has been determined on the basis of the comparative analysis of auroral kilometric radiation (AKR) received in the space-diversity mode by two satellites, Interball-2 and Polar. The radiation propagates in a cone with an opening angle ~±25° and the axis aligned with the local magnetic field. The results con-firm the theoretical estimates that the source boundaries play a significant role in the generation of the auroral kilometric radiation and in the formation of the radiation pattern. 相似文献
3.
E. Kh. Mukhamedzhanov M. M. Borisov A. N. Morkovin A. A. Antonenko A. P. Oreshko E. N. Ovchinnikova V. E. Dmitrienko 《JETP Letters》2007,86(12):783-787
The 222 and 600 reflections near the germanium absorption K edge were studied on the Kurchatov synchrotron radiation source. The energy spectrum of the 222 reflection is caused by the
interference of the weak nonresonant and purely resonant contributions to the tensor atomic factor, whereas the 600 reflection
is purely resonant. The energy dependence of the magnitude and phase of the resonant contribution to the scattering amplitude
was determined from a change in the interference pattern. The numerical simulation of the energy spectra of reflections with
the inclusion of the dipole-quadrupole and thermally induced contributions shows that the latter is dominant at room temperature.
Original Russian Text ? E.Kh. Mukhamedzhanov, M.M. Borisov, A.N. Morkovin, A.A. Antonenko, A.P. Oreshko, E.N. Ovchinnikova,
V.E. Dmitrienko, 2007, published in Pis’ma v Zhurnal éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 86, No. 12, pp.
896–900. 相似文献
4.
A new scheme is proposed for proton and light-ion acceleration to relativistic energies by superstrong laser radiation interacting
with a structured plasma target. The proposal consists in the use of two-component targets consisting of heavy and light ions,
where an ambipolar field is formed under the action of the ponderomotive force of incident radiation, and, in contrast to
the traditional schemes, acceleration starts from the front boundary of the layer. It is shown that, for the optimized target
parameters, monoenergetic GeV ion beams can be produced for radiation pulse intensities on the order of 1021−1022 W/cm2.
Original Russian Text ? A.V. Korzhimanov, A.A. Gonoskov, A.V. Kim, A.M. Sergeev, 2007, published in Pis’ma v Zhurnal éksperimental’noĭ
i Teoreticheskoĭ Fiziki, 2007, Vol. 86, No. 9, pp. 662–669. 相似文献
5.
The stimulated radiation pressure acting on an atom nonadiabatically interacting with the field of counterpropagating frequency-modulated
waves is shown to reach high values typical for the rapid adiabatic passage of the instantaneous frequency of the field of
the counterpropagating waves through resonance with an atomic transition. Under the appropriate choice of interaction parameters,
the radiation pressure changes insignificantly in a wide range of atomic velocities.
Original Russian Text ? V.I. Romanenko, L.P. Yatsenko, 2007, published in Pis’ma v Zhurnal éksperimental’noĭ i Teoreticheskoĭ
Fiziki, 2007, Vol. 86, No. 12, pp. 868–872. 相似文献
6.
Extremely high values of the relative permittivity up to 107 and the magnetocapacitance up to 105% have been found in La1 − x
Sr
x
MnO3 single crystals (x = 0.1, 0.11). These phenomena are observed even at room temperature. The observed behavior can be a consequence of the strong
interaction among charge, spin, and lattice degrees of freedom, which leads to charge and phase separation in the regime before
the percolation threshold.
Original Russian Text ? R.F. Mamin, T. Egami, Z. Marton, C.A. Migachev, M.F. Sadykov, 2007, published in Pis’ma v Zhurnal
éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 86, No. 10, pp. 731–735. 相似文献
7.
The thin films of a CoPd alloy in the equiatomic composition region are prepared by condensation at different substrate temperatures.
The substrate temperature is varied from the liquid nitrogen temperature to +280°C. At low substrate temperatures, the crystal
structure of the condensed films is the single-crystal blocks of the hexagonal close-packed (hcp) phase. As the substrate
temperature is further increased, the domains characterized in the initial state by the microdiffraction patterns in the form
of a diffuse halo appear in the films, and these domains have a clear-cut boundary with the regions indicated by point reflections
in the electron diffraction patterns. At substrate temperatures from +150 to 160°C, the CoPd alloy films in the equiatomic
composition region are fully amorphous. The given state is a polymorphic transformation of the martensitic type. It arises
in the martensitic transformation of the low-temperature hcp phase to the high-temperature fcc phase.
Original Russian Text ? E.M. Artem’ev, M.E. Artem’ev, 2007, published in Pis’ma v Zhurnal éksperimental’noĭ i Teoreticheskoĭ
Fiziki, 2007, Vol. 86, No. 11, pp. 838–840. 相似文献
8.
S. N. Molotkov 《JETP Letters》2007,86(12):788-792
The simultaneous measurement of the energy and arrival time of a single-photon packet, as well as the experimental implementation
of such a measurement with the use of a parametric transformation upward in the energy (up conversion), is proposed.
Original Russian Text ? S.N. Molotkov, 2007, published in Pis’ma v Zhurnal éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007,
Vol. 86, No. 12, pp. 901–906. 相似文献
9.
In YBa2Cu3O7 − x
films grown on sapphire bicrystal substrates, the Josephson junctions are prepared based on artificial grain boundaries formed
by the turn of the crystal lattices about the [100] axis. The films are deposited by the laser ablation method on the buffer
CeO2 layer. The critical film temperature reaches 88.5 K with a transition width of 1.5 K. Junctions from 2 to 3-μ m wide are
integrated into the planar log-periodic antennas and their characteristics are measured at 77 K. The characteristic voltage
I
c
R
n
reaches 570 μV. With exposure to external radiation at a frequency of 113 GHz, the Shapiro steps were observed on the current-voltage
characteristic. The temperature sensitivity of this detector placed in a quasi-optical receiving unit is measured. At the
modulation of the input radiation temperature 77 K/300 K, a response of more than 200 nV is observed at the detector output.
At the modulation frequency, intrinsic noise is about 1 nV/Hz1/2, which corresponds to a temperature resolution of 1 K.
Original Russian Text ? M. Tarasov, E. Stepantsov, A. Kalabukhov, M. Kupriyanov, D. Winkler, 2007, published in Pis’ma v Zhurnal
éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 86, No. 11, pp. 828–831. 相似文献
10.
The effect of microwave electromagnetic radiation on the resistance of the 2D electron gas in a GaAs/AlAs heterostructure
in a strong magnetic field is investigated. It is shown that, under the nonequilibrium conditions caused by microwave radiation,
the aforementioned 2D system exhibits giant oscillations of its resistance with varying magnetic field. When the measuring
current density is small, an increase in the microwave power leads to the appearance of an absolute negative resistance at
the main minimum of these oscillations, which lies near the cyclotron resonance. The experimental data are found to be in
qualitative agreement with the theory of multiphoton photoinduced impurity scattering [J. Inarrea and G. Platero, Appl. Phys.
Lett. 89, 052109 (2006)].
Original Russian Text ? A.A. Bykov, D.R. Islamov, D.V. Nomokonov, A.K. Bakarov, 2007, published in Pis’ma v Zhurnal éksperimental’noĭ
i Teoreticheskoĭ Fiziki, 2007, Vol. 86, No. 9, pp. 695–698. 相似文献
11.
《Acoustical Physics》2006,52(5):495-504
High-frequency noise of Lake Baikal is investigated using a submersible self-contained instrument to determine the noise background
for the acoustic detection of superhigh-energy neutrinos. It is found that, under stationary and uniform meteorological conditions,
the integral noise power in the frequency band 1–50 kHz is virtually independent of depth and is 10–200 mPa or more, depending
on the specific conditions. The noise itself contains multiple short pulses of different amplitudes and shapes.
Original Russian Text ? V.M. Aĭnutdinov, V.A. Balkanov, I.A. Belolaptikov, L.B. Bezrukov, N.M. Budnev, R.V. Vasil’ev, R. Wischnewski,
O.N. Gaponenko, R.Yu. Gnatovskiĭ, O.A. Gress, T.I. Gress, O.G. Grishin, I.A. Danil’chenko, Zh.-A.M. Dzhilkibaev, A.A. Doroshenko,
A.N. Dyachok, G.V. Domogatskiĭ, V.A. Zhukov, A.M. Klabukov, A.I. Klimov, S.I. Klimushin, K.V. Konishchev, A.A. Kochanov, A.P.
Koshechkin, V.F. Kulepov, L.A. Kuz’michev, B.K. Lubsandorzhiev, T. Mikolajskiĭ, M.B. Milenin, R.R. Mirgazov, S.P. Mikheev,
é.A. Osipova, A.I. Panfilov, A.A. Pavlov, G.L. Pan’kov, L.V. Pan’kov, E.N. Pliskovskiĭ, V.A. Poleshchuk, E.G. Popova, P.G.
Pokhil, V.V. Prosin, M.I. Rozanov, V.Yu. Rubtsov, B.A. Tarashchanskiĭ, S.V. Fialkovskiĭ, A.G. Chenskiĭ, B.A. Shaĭbonov, Ch.
Spiering, O. Streicher, I.V. Yashin, 2006, published in Akusticheskiĭ Zhurnal, 2006, Vol. 52, No. 5, pp. 581–591. 相似文献
12.
The differential energy spectrum of cosmic rays that is obtained on the basis of the measurements of Cherenkov radiation from
extensive air showers in an energy range of 1015–1020 eV is compared with the model of the propagation of primary particles in the interstellar medium with fractal properties.
It is found that the shape of the experimental spectrum is in good agreement with the shape of the calculated spectrum of
“all particles” at 1015–1018 eV. The average mass composition of cosmic rays that is calculated on the basis of five components does not contradict the
average mass composition obtained from the experimental data for several parameters in this energy range.
Original Russian Text ? S.P. Knurenko, A.A. Ivanov, A.V. Saburov, 2007, published in Pis’ma v Zhurnal éksperimental’noĭ i
Teoreticheskoĭ Fiziki, 2007, Vol. 86, No. 10, pp. 709–712. 相似文献
13.
The properties of a capacitive HF discharge with growing nanoparticles are studied with the use of kinetic PIC-MCC simulation.
At the initial stage of growth, the nanoparticles are shown to be localized at the interface between the near-electrode layer
and quasi-neutral plasma, where the rate of ionization by electron impact has the maximum value. At the beginning of formation
of particles, plasma parameters change rapidly and a transition between the capacitive and spatial discharge burning modes
is observed for a certain critical size of the particles. If the growth of the dust particles continues, their distribution
over the discharge becomes more uniform and the steady-state parameters of the gas-discharge plasma hardly change.
Original Russian Text ? I.V. Shveigert, F.M. Peeters, 2007, published in Pis’ma v Zhurnal éksperimental’noĭ i Teoreticheskoĭ
Fiziki, 2007, Vol. 86, No. 9, pp. 657–661. 相似文献
14.
Results of an experiment on the opening of cavities in small icosahedral electrolytic-copper particles by means of an experimental
technique alternative to the chemical etching of their surface are presented. This experimental technique is theoretically
justified.
Original Russian Text ? I.S. Yasnikov, A.A. Vikarchuk, 2007, published in Pis’ma v Zhurnal éksperimental’noĭ i Teoreticheskoĭ
Fiziki, 2007, Vol. 86, No. 9, pp. 699–701. 相似文献
15.
R. B. Saptsov 《JETP Letters》2007,86(10):687-691
The behavior of a weakly interacting Bose gas with a finite particle lifetime has been studied in the framework of hydrodynamic
equations under the conditions of a constant mass and energy inflow in the presence of external cooling. A spatially homogeneous
state of such a gas is shown to be unstable with respect to the formation of an inhomogeneous density structure. A possible
connection of the present results with experiments [3, 4] is discussed.
Original Russian Text ? R.B. Saptsov, 2007, published in Pis’ma v Zhurnal éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007,
Vol. 86, No. 10, pp. 779–784. 相似文献
16.
V. G. Nikiforov G. M. Safiullin A. G. Shmelev A. V. Leontev V. S. Lobkov 《JETP Letters》2007,86(10):666-669
The control of the anisotropy of the orientation of molecules in pure 1,2-dichlorobenzene, C6H4Cl2 at room temperature is demonstrated experimentally. To accomplish the optical control, the medium is exposed to non-resonant
excitation with two successive linearly polarized laser pulses with a duration of 60 fs. The state of transient anisotropy
is probed with the third pulse by detecting the ultrafast optical Kerr effect via optical heterodyne detection and synchronous
demodulation. It is shown that variations in the two parameters, the delay time between two pump pulses, and the angle between
the polarization directions of the pump pulses ensure the control of the anisotropy of the orientation of molecules in the
subpicosecond region.
Original Russian Text ? V.G. Nikiforov, G.M. Safiullin, A.G. Shmelev, A.V. Leont’ev, V.S. Lobkov, 2007, published in Pis’ma
v Zhurnal éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 86, No. 10, pp. 757–761. 相似文献
17.
N. E. Sluchanko D. N. Sluchanko V. V. Glushkov S. V. Demishev N. A. Samarin N. Yu. Shitsevalova 《JETP Letters》2007,86(9):604-607
Within a wide temperature range of 1.8–300 K, the Hall effect in holmium dodecaboride is investigated. The measurements of
the angular dependences of the Hall resistance ρH(φ, T, H) for HoB12 performed in a high magnetic field up to 80 kOe at helium and intermediate temperatures made it possible to separate the
normal and anomalous contributions to the Hall effect. Analysis of the anomalous component behavior in the paramagnetic and
Néel phases suggests the appearance of the 5d-state magnetic polarization (the spin polaron effect) and makes it possible to compare the revealed features of the Hall
coefficient R
H(T, H) with the H-T magnetic phase diagram of HoB12.
Original Russian Text ? N.E. Sluchanko, D.N. Sluchanko, V.V. Glushkov, S.V. Demishev, N.A. Samarin, N.Yu. Shitsevalova, 2007,
published in Pis’ma v Zhurnal éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 86, No. 9, pp. 691–694. 相似文献
18.
Measurement of the e+e? → π+π? cross section with the CMD-2 detector in the 370–520-MeV energy range
《JETP Letters》2006,84(8):413-417
The results of the experiment on the measurement of the e
+
e
− → π+π− cross section in a cm energy range of 370–520 MeV are presented. The systematic measurement error is equal to 0.7%. In the
vector dominance model, the pion electromagnetic radius is calculated using all the CMD-2 data on the pion form factor. The
cross section for the production of a muon pair is measured in the energy range of the experiment.
Original Russian Text ? V.M. Aul’chenko, R.R. Akhmetshin, V.Sh. Banzarov, L.M. Barkov, N.S. Bashtovoĭ, D.V. Bondarev, A.E.
Bondar’, A.V. Bragin, N.I. Gabyshev, D.A. Gorbachev, A.A. Grebenyuk, D.N. Grigor’ev, S.K. Dhawan, D.A. Epifanov, A.S. Zaĭtsev,
S.G. Zverev, F.V. Ignatov, V.F. Kazanin, S.V. Karpov, I.A. Koop, P.P. Krokovny, A.S. Kuz’min, I.B. Logashenko, P.A. Lukin,
A.P. Lysenko, A.I. Mil’shteĭn, K.Yu. Mikhaĭlov, I.N. Nesterenko, M.A. Nikulin, A.V. Otboev, V.S. Okhapkin, E.A. Perevedentsev,
A.S. Popov, S.I. Redin, B.L. Roberts, N.I. Root, A.A. Ruban, N.M. Ryskulov, A.L. Sibidanov, V.A. Sidorov, A.N. Skrinsky, V.P.
Smakhtin, I.G. Snopkov, E.P. Solodov, J.A. Thompson, G.V. Fedotovich, B.I. Khazin, V.W. Hughes, A.G. Shamov, Yu.M. Shatunov,
B.A. Shvarts, S.I. éĭdel’man, Yu.V. Yudin, 2006, published in Pis’ma v Zhurnal éksperimental’noĭ i Teoreticheskoĭ Fiziki,
2006, Vol. 84, No. 8, pp. 491–495. 相似文献
19.
Spectral dependences of the relative permittivity ɛ = ɛ1 − iɛ2 of a uniaxial weak ferromagnet FeBO3 are measured for two principal polarizations in the energy range 0.6–5.6 eV. The positions have been determined for the charge-transfer
transitions that make the main contribution to absorption above the bandgap and determine the refractive-index dispersion
below the bandgap. The isotropic magnetic contribution to the refractive index has been detected by studying the temperature
dependence of the refractive index in the range 100–700 K; its value (≈2 × 10−2) is found to be record high for magnetic dielectrics. The energy shift of the effective oscillator, which characterizes the
shift of the positions of the charge-transfer transitions due to magnetic ordering, is determined from these data within the
framework of a single-oscillator model. The value of the exchange striction in FeBO3 is determined from optical measurements.
Original Russian Text ? P.A. Markovin, A.M. Kalashnikova, R.V. Pisarev, Th. Rasing, 2007, published in Pis’ma v Zhurnal éksperimental’noĭ
i Teoreticheskoĭ Fiziki, 2007, Vol. 86, No. 11, pp. 822–827. 相似文献