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181.
In the framework of quantum-mechanical fission theory, the method of calculation for partial fission width amplitudes and
asymptotic behavior of the fissile nucleus wave function with strong channel coupling taken into account has been suggested.
The method allows one to solve the calculation problem of angular and energy distribution countation for binary and ternary
fission.
The text was submitted by the authors in English. 相似文献
182.
183.
Dovol'nov E. A. Pen E. F. Sharangovich S. N. Shelkovnikov V. V. 《Russian Physics Journal》2004,47(7):773-783
The formation of holographic transmission gratings in absorbent photopolymer materials (PPM) is studied theoretically. Analytical model describing a spatiotemporal transformation of holographic grating field during record is developed with allowance for optical absorption and diffusion processes. It is demonstrated that optical attenuation during record causes the spatial inhomogeneity of refractive index grating profile and of the its growth kinetics. A degree of influence of optical attenuation on the integral diffraction characteristics is evaluated based on numerical simulation. The kinetics of record of high-efficient transmission holograms in PPM is experimentally investigated. Based on a comparison of theoretical and experimental time dependences of diffraction efficiency, physical parameters of the examined PPM are determined and adequacy and tendency in the development of the suggested mathematical model are evaluated. 相似文献
184.
Zhu Zhuo Guoling Li Chenglin Shu Wei Wang Caiping Liu Mingyan Wu Yougui Huang Maochun Hong 《中国科学:化学(英文版)》2021,(1):22-28
Metal-organic frameworks showing successive magnetic ordering are far less common than inorganic compounds.Here,we report two metal-organic frameworks[Co^Ⅱ(ox)(bphy)·0.1(DMF)·0.1(Me OH)]n(1)and[Co3^Ⅱ(ox)3(bphy)2(DMF)2]n(2)comprised of zigzag and necklace Co^Ⅱ-ladders,respectively.Together with a previously reported compound[Co^Ⅱ(ox)(bphy)·0.2(DMF)]n(3)consisting of spiraling zigzag Co^Ⅱ-ladders,these three compounds provide a good system for comparative structural and magnetic studies.Comprehensive magnetic analysis reveals that the three compounds undergo long-range magnetic ordering at^2.6 K but exhibit vastly different short-range magnetic correlations:compound 1 shows short-range spin-canted antiferromagnetism ordering at^14.0 K;compound 2 demonstrates successive short-range antiferromagnetism ordering at^15.5and^12.6 K;compound 3 shows slow magnetic relaxation with Tb≈4.6 K.These results demonstrate long-range magnetic ordering is readily accessible in the frameworks of ox^2-bridging Co^Ⅱ-ladders linked by bphy,where short-range magnetic correlations can be systematicly tuned by the Co^Ⅱ-ladder structures. 相似文献
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