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排序方式: 共有69条查询结果,搜索用时 15 毫秒
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B. Ameduri K. Berrada B. Boutevin R. D. Bowden 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4):477-478
Abstract The synthesis of novel monodispersed telechelic diols from the radical telomerization of undecylenol with new α,ω-dithiols was investigated. These diols are semi-crystalline and exhibit a thermal stability much higher than that of commercially available polydispersed diols. 相似文献
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In this paper, we study the time evolution of the geometric phase and nonlocal correlations for a three-level atom interacting with the quantum field emerged in a nonlinear Kerr medium. We discuss the dependence of the physical quantifiers on the phase damping effect. We examine the effects of the initial state and different system parameters on the evolution of the nonlocal correlation and geometric phase with and without the phase damping effect. Furthermore, we explore the link between the geometric phase and the nonlocal correlation during the time evolution. Finally, we show that the model proposed will be very useful to avoid the phase damping effect by a proper choice of the physical parameters in the field for both cases of the initial pure and mixed states of the three-level atom. 相似文献
4.
G. Krill J. Durand A. Berrada N. Hassanain M.F. Ravet 《Solid State Communications》1980,35(7):547-550
We present the results of XPS and X-ray absorption measurements performed on the amorphous Sm Au and La Sm Au compounds. The XPS Sm 3d core level spectra in these compounds reveal that at the surface (5 ? 7 Å) the samarium ions present both the Sm2+ (4f6) and Sm3+ (4f5) configurations. When the concentration in samarium decreases it is shown that the Sm2+ configuration is strongly enhanced at the surface whereas the X-ray absorption measurements indicate on the contrary that in the bulk only the Sm3+ configuration is present. Comparison is made with similar findings in pure crystalline Sm and various crystalline rare earth compounds. 相似文献
5.
A. Ait Haddou M. Berrada G. Paić 《Journal of Radioanalytical and Nuclear Chemistry》1986,102(1):159-175
The yield and average cross section for the reactions11B(p, n)11C,12C(p, )13N,13C(p, n)13N,
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C(d, n)13N,14N(p, )11C,16O(p, )13N,16O(d, n)17F,16O(t, n)18F, and18O(p, n)18F have been measured in different compounds. The charged particles were created in the samples themselves either through recoil by scattering of 14 MeV neutrons off hydrogen and deuterium, or by the (n, t) reaction on6Li using thermal neutrons. The yields of reactions12C(d, n);16O(p, );16O(t, n) and18O(p, n) have been measured using proton, deuteron and triton spectra generated by 14 MeV neutrons in the reactions D(n, p)2n;6Li(n, d);7Li(n, d) and10B(n, d);7Li(n, t) and10B(n, t), respectively. 相似文献
6.
Optical emission resulting from sputtered species during ion bombardment of porous and oxidized porous silicon targets has been studied. Samples were bombarded with 5‐keV Kr+ ions at an incidence angle of 70 degrees, and the light emitted was analyzed over the wavelength range 200–300 nm. The surface morphology was investigated, and the micrographs revealed grooves parallel to the plane of incidence when the porosity was surprisingly observed in the grooves under each pore. The results are discussed as a function of the incidence angle and the porosity of the silicon targets. 相似文献
7.
El-Qahtani Zainab M. H. Abdel-Khalek Sayed Berrada Kamal 《Journal of Russian Laser Research》2022,43(2):139-147
Journal of Russian Laser Research - In this work, we study quantum coherence, the degree of mixedness, and total quantum correlation in two interacting superconducting charge qubits (SCQs) in both... 相似文献
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S. Abdel-Khalek K. Berrada H. Eleuch M. Abel-Aty 《Optical and Quantum Electronics》2011,42(14-15):887-897
This paper describes the dynamics of the Wehrl entropy and Wehrl phase distribution of a degenerate two-photon of a single mode interacting with a two-level system with a nonlinear medium. A general analytic expression for the Husimi Q function is obtained. The influence of various parameters on the Wehrl entropy and Wehrl phase distribution are explored. It is shown that features of the Wehrl entropy and Wehrl phase distribution were influenced significantly by changing the nonlinear medium, Stark shift and the detuning. For certain amounts of the nonlinear effect, superstructure of atomic Rabi oscillation and changes of the quasi-period of the entropy evolution are observed. 相似文献
10.
K. Berrada S. Abdel-Khalek 《Physica E: Low-dimensional Systems and Nanostructures》2011,44(3):628-634
In this paper, we investigate the entanglement of the field interacting with Ξ-type moving three-level atom. The results show that the deformed effect, atomic motion and the field-mode structure play important roles in the evolution of entanglement and marginal atomic Q-function behavior. We test this observation with experimentally accessible parameters and some new aspects are obtained. 相似文献