排序方式: 共有37条查询结果,搜索用时 15 毫秒
1.
T. M. Shneidman G. G. Adamian N. V. Antonenko S. P. Ivanova R. V. Jolos W. Scheid 《Physics of Atomic Nuclei》2003,66(2):206-217
Based on the dinuclear system concept, the role of bending vibrations in creation of the angular momentum of primary fission fragments is investigated. For 252Cf spontaneous fission, the angular momenta of the fragments are calculated as a function of the neutron multiplicity and compared with available experimental data. Different cluster compositions of the 252Cf fission modes at the scission point are considered. 相似文献
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Jolos R. V. Kolganova E. A. Malov L. A. Mardyban E. V. Sazonov D. A. Shneidman T. M. 《Physics of Atomic Nuclei》2020,83(4):550-557
Physics of Atomic Nuclei - Examples of phase transitions occurring in atomic nuclei in response to an increase in the excitation energy and angular momenta and in response to a change in the number... 相似文献
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The angular-momentum dependences are analyzed for parity splitting and electric dipole transitions in alternating-parity bands of heavy nuclei. It is shown that these dependences can be treated universally by employing a single parameter taken to be a critical angular momentum that characterizes the phase transition from octupole vibrations to a stable octupole deformation. Analytic expressions for parity splitting and the electric dipole transitional moment are obtained on the basis of a simple model. The results are compared with experimental data for various barium, cerium, and neodymium isotopes. 相似文献
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T. M. Shneidman G. G. Adamian N. V. Antonenko R. V. Jolos H. Lenske W. Scheid 《Physics of Atomic Nuclei》2016,79(6):963-977
A cluster approach is used to describe ground-state-based alternating-parity bands in even–even nuclei and to study the band-termination mechanism. A method is proposed for testing the cluster nature of alternating-parity bands. 相似文献
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For a nearest-neighbor Ising model on a square lattice all cluster configurations with 17 or fewer spins are identified. In neglect of cluster-cluster interactions, critical sizes and barriers to nucleation are obtained as functions of temperature and magnetic field for two alternative definitions of a "critical cluster." 相似文献
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G. G. Adamian N. V. Antonenko R. V. Jolos Yu. V. Palchikov T. M. Shneidman W. Scheid 《Physics of Atomic Nuclei》2007,70(8):1350-1356
The dinuclear-system model can be applied to nuclear structure. Here, we study deformed clusters which rotate with respect
to the internuclear distance and exchange nucleons. The model can be used to explain the band structure of nuclear spectra,
especially the parity splitting observed in actinides, e.g., in 238U.
The text was submitted by the authors in English. 相似文献
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We report the time-dependent nucleation fluxes and associated nucleation rates in a metastable Ising ferromagnet on square lattice with Metropolis (Glauber-type) dynamics. It is discovered that, with lowering of the temperature, fluxes collapse into several representative transient curves corresponding to magic cluster sizes. Those can be associated with physical droplets, i.e., long-lived configurations which provide a link with the classical Becker-D?ring picture. 相似文献
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Frédérin abwergel Jacques Herbert Ballly Herbert Ballly H Beirao da Veiga VA Solonnikov 《偏微分方程通讯》2013,38(9-10):1323-1358
We study a class of stationary transport equation with nonlocal low-order tems We obtain the existence and uniqueness of a solution in sobolev spaces 相似文献