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Reutova O. V. Belokoneva E. L. Dimitrova O. V. Volkov A. S. 《Crystallography Reports》2022,67(7):1122-1126
Crystallography Reports - Fluoride crystals K2(Ta0.9I0.1)F7 (sp. gr. Р21/c) complementary to the K2TaF7 and K2NbF7 fluoride family have been obtained by hydrothermal synthesis. Their... 相似文献
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A. G. Reutova M. R. Ul’maskulov A. K. Sharypov V. G. Shpak S. A. Shunailov M. I. Yalandin V. I. Belousov N. S. Ginzburg G. G. Denisov I. V. Zotova R. M. Rozental’ A. S. Sergeev 《JETP Letters》2005,82(5):263-266
The generation of ultrashort superradiant pulses in the stimulated scattering of an intense microwave (38 GHz) pump wave by a counterpropagating high-current relativistic electron bunch has been observed. Scattered radiation is a single ~200-ps pulse with a peak power of about 1 MW. Owing to the Doppler shift of the radiation frequency, frequencies up to 150 GHz are present in the spectrum of the scattered pulse. 相似文献
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Yu.?Yu.?BacherikovEmail author N.?V.?Kitsyuk S.?V.?Optasyuk V.?E.?Rodionov A.?A.?Stadnik E.?G.?Reutova 《Journal of Applied Spectroscopy》2005,72(1):95-98
The influence of atmospheric passivation on the electro- and photoluminescent properties of ZnS powders doped with In and/or CuCl is investigated. The processes proceeding in the material during thermal doping with In and/or CuCl as well as participation of oxygen in forming the electro- and photoluminescent radiation centers are discussed. The possibility of creating electro- and photoluminophors based on ZnS that have a continuous spectrum in the visible range with the same spectral density is shown. An electroluminophor based on ZnS:In,Cu,Cl that emits radiation with practically the same spectral density in the 550–750-nm range has been created as well as a photoluminophor based on ZnS:In that emits similarly within the range 500 < < 700 nm.__________Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 72, No. 1, pp. 90–93, January–February, 2005. 相似文献
4.
Reutova O. V. Belokoneva E. L. Dimitrova O. V. Volkov A. S. 《Crystallography Reports》2020,65(3):428-432
Crystallography Reports - Crystals of new iodate Na3Fe[IO3]6 were prepared by the hydrothermal synthesis (the unit cell parameters a = 6.6886(2) Å, b = 6.7756(3) Å, c = 10.1396(6) Å,... 相似文献
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K. V. Berezhnoi A. S. Nasibov A. G. Reutova P. V. Shapkin S. A. Shunailov M. I. Yalandin 《Bulletin of the Lebedev Physics Institute》2011,38(3):65-67
The design of the generator of picosecond laser pulses and the results on semiconductor target (ZnSe, CdS, and others) excitation by electric field and electron beam pulses are presented. The maximum power of laser radiation reached 10 kW at pulse durations of 100–200 ps. 相似文献
6.
N. V. Denisova V. S. Egorov V. V. Kozlov N. M. Reutova P. Yu. Serdobintsev É. E. Fradkin 《Journal of Experimental and Theoretical Physics》1998,86(1):39-48
The coherent V-configuration interaction between an optically dense resonantly-absorbing three-level medium (neon) and two ultrashort superradiance
pulses with converging wave fronts is investigated experimentally and theoretically. Both separate and combined propagation
of pulses with wavelengths λ
1=614.3 nm (strong field, θ
1⩾π) and λ
3=594.5 nm (weak field, θ
3≈/20) are studied. For propagation of a separate strong-field pulse, supertransparency of the absorbing medium was observed,
which is associated with the generation of a soliton-like pulse at the difference frequency (Δν≈1700 MHz) and the dispersion-diffraction stabilization effect. Under these conditions a weak-field pulse is completely absorbed.
Combined propagation of the pulses leads to novel effects. A below-threshold pulse (weak field) was observed to pass through
the absorber while interacting coherently with a strong-field pulse at a neighboring transition. It is shown theoretically
that absorption of the weak pulse is reduced for two reasons: first, as a result of incoherent transparency of the resonance
transition caused by emptying of the lower level by the field of the strong pulse, and second, as a result of coherent transfer
of polarization between the upper levels via the two-photon processes. When the conditions for combined propagation are met,
the latter mechanism ensures inversionless amplification of a weak pulse over a wide band of frequencies. In this case, the
gain can even exceed the linear absorption coefficient in absolute value. A difference in propagation velocities of the weak
and strong pulses was recorded experimentally, along with a shift in the carrier frequency of the weak field towards the red
(≈600 MHz). A mechanism for transfer of phase modulation from a strong pulse to a weak pulse via the common lower level is
discussed theoretically.
Zh. éksp. Teor. Fiz. 113, 71–88 (January 1998) 相似文献
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8.
Reutova O. V. Belokoneva E. L. Dimitrova O. V. Volkov A. S. 《Crystallography Reports》2020,65(5):711-715
Crystallography Reports - Crystals of new silicogermanate Ba2K2In2[(Si0.8Ge0.2)6O18] · 2H2O were prepared by the hydrothermal synthesis; sp. gr. P21/n, a = 6.5548(6) Å, b = 11.6946(10)... 相似文献
9.
M. I. Yalandin A. G. Reutova M. R. Ul’maskulov K. A. Sharypov S. A. Shunailov N. S. Ginzburg I. V. Zotova E. R. Kocharovskaya A. S. Sergeev 《JETP Letters》2010,91(11):553-557
An effect of the nonlinear compression of ultrashort microwave pulses has been observed in the process of the amplification
of quasistationary electron beams. The Cherenkov mechanism of the interaction of a rectangular electron beam with a decelerated
wave in a waveguide partially filled with an insulator is used. The experiment has been conducted on a setup consisting of
two synchronized RADAN high-current accelerators. The first accelerator supplied a generator of 37-GHz superradiance pulses
with a duration of about 300 ps. The second accelerator with a beam current of up to 1.2 kA and an electron energy of about
300 keV was used in an amplifying section. The theoretical analysis shows that the amplification of the electromagnetic pulses
(at least by a factor of 4 in the power) is accompanied by a strong decrease in their duration (down to 100 ps). 相似文献
10.
Synthesis and Crystal Structure of a New Iodate (Pb0.6Ba0.4)(Pb0.4Ba0.6)[IO3]4 Analogous to Sr[IO3]2
Belokoneva E. L. Reutova O. V. Dimitrova O. V. Volkov A. S. 《Crystallography Reports》2019,64(4):590-593
Crystallography Reports - Crystals of a new triclinic iodate with the formula (Pb0.6Ba0.4)(Pb0.4Ba0.6)[IO3]4 (sp. gr. P$$\bar {1}$$) were prepared by hydrothermal synthesis. These crystals are... 相似文献
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