检索结果-南通市图书馆

Further research on high-spin structure in ^(161)Lu

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2008年第3期51卷 315-320页

作者： LI YanXia1,2,YU ShaoYing1,2,4,SHEN CaiWan1,5,LI XiaoWei6 & CHEN YongShou3,4 1 School of Science,Huzhou Teachers College,Huzhou 313000,China 2 College of Mathematics,Physics and Information Engineering,Zhejiang Normal University,Jinhua 321000,China 3 China Institute of Atomic Energy,Beijing 102413,China 4 Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100080,China 5 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,China 6 Department of Physics,Chifeng University,Chifeng 024001,China School of Science Huzhou Teachers College Huzhou 313000 China College of Mathematics Physics Information Engineering Zhejiang Normal University Jinhua 321000 China China Institute of Atomic Energy Beijing 102413 China Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100080 China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou 730000 China Department of Physics Chifeng University Chifeng 024001 China

The two-dimensional total routhian surface (TRS) calculations were performed to probe into the triaxial superdeformed characteristics of a strongly populated band X2 in 161Lu. This band was identified as a triaxial superdeformed band by using our TRS method. We also got its formation mechanics,i.e. the neutron-shell correction energy plays a crucial role,while the rotating energy and the deformation-driving effect of high j intruder orbit i13/2 also play an additional role.

关键词： TRS method triaxial superdeformation formation mechanism

Anomalously Large Deformation in Some Medium and Heavy Nuclei

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2005年第4X期44卷 687-696页

作者： CHEN Ding-Han REN Zhong-Zhou TAI Fei Department of Physics Nanjing University Nanjing 210008 China Center of Theoretical Nuclear Physics National Laboratory of Heavy-Ion Accelerator at Lanzhou Lanzhou 730000China

We investigate the properties of the Ce isotopes with neutron number N =60 - 90 and the properties of the heavy nuclei near 242Am within the framework of deformed relativistic mean-field （RMF） theory. A systematic comparison between theoretical results and experimental data is made. The calculated binding energies, two-neutron separation energies, and two-proton separation energies are in good agreement with experimental ones. The variation trend of experimental quadrupole deformation parameters on the Ce isotopes can be approximately reproduced by the RMF model. It is found that there exists an abnormally large deformation in the ground state of proton-rich Ce isotopes. This phenomenon can be the general behavior of proton-rich nuclei on the neighboring isotopic chains such as Nd and Sin isotopes. For the heavy nuclei near ^242 Am the properties of the ground state and superdeformed isomeric state can be approximately reproduced by the RMF model. The mechanism of the appearance of anomalously large deformation or superdeformation is analyzed and its influence on nuclear properties is discussed. Parther experiments to study the anomalously large deformation in some proton-rich nuclei are suggested.

关键词： superdeformation proton-rich Ce nuclei isomeric state of ^242Am constraint relativistic meanfield calculation

Oblate Superdeformed High-K States in Superheavy Nuclei

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2013年第11期60卷 577-580页

作者：刘红亮 Department of Applied Physics School of Science Xi’an Jiaotong University

Configuration-constrained calculations of potential-energy surfaces for ^292 122 show the occurrence of multiquasiparticle high-K isomeric state at oblate superdeformation. Such state could play a unique role in superheavy nuclei, with possible long life time from enhanced difficulty in fission due to additional barrier at oblate deformation, retardation in a decay due to unpaired nucleons, and hindrance in γ-ray transition due to K forbiddenness.

关键词： oblate deformation superdeformation K isomer superheavy nucleus

Deexcitation Energy of Superdeformed Secondary Minima as a Probe to Density Dependence of Symmetry Energy

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2010年第10期54卷 715-722页

作者：蒋维洲陆幸陈云鹏 Department of Physics Southeast University Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator

Deexcitation energies of superdeformed secondary minima of odd-odd A u and T1 isotopes are investigated with the relativistic mean field （RMF） model where the isoscalar-isovector coupling is included to change the symmetry energy. It is verified by the theoretical analysis and numerical results that the deexcitation energies of superdeformed secondary minima relative to the ground states in these heavy nuclei are sensitive to differences in the symmetry energy. In particular, the linear correlation between the deexeitation energies of odd-odd Au and T1 isotopes and the neutron skin thickness in 208Pb is established. Moreover, explorations are extended to superdeformed candidates of other mass regions. It is found that the linear correlation can even be established between the deexcitation energies and the symmetry pressure at subsaturation density. These indicate that deexcitation energies can serve as a probe to the density dependence of the symmetry energy.

关键词： symmetry energy superdeformation relativistic mean-field models

Study of △I=2 staggering by perturbed particle-rotor model

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 1996年第12期39卷 1296-1303页

作者：邢正王晓春陈星蕖 (Department of Modern Physics Lanzhou University Lanzhou 730000 China)

AI=2 staggering in superdefonned nuclei has been investigated by a perturbed particle-rotor model, of which all observed features are reproduced in the calculations. It is pointed out that the C4symmetry in Hamiltonian is not the only cause of AI=2 staggering. This model can be used to make a fit to the experimental data in odd-A superdeformed nuclei.

关键词： nuclear structure superdeformation particle-rotor model C4 symmetry △I=2 staggering.

Wobbling Rotation in Atomic Nuclei

在线全文

学校读者我要写书评

暂无评论

Wobbling Rotation in Atomic Nuclei