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Quantum chaotic motion of a single particle in heavy nuclei
Gu, JZ; Wu, XZ; Zhou, YZ; Zhao, EG; Gu, JZ , CCAST,WORLD LAB,POB 8730,BEIJING 100080,PEOPLES R CHINA.
1997
发表期刊NUCLEAR PHYSICS A
ISSN0375-9474
卷号625期号:3页码:621-632
摘要In the framework of the two-center shell model we calculate the nearest neighbor level spacing distribution and spectral rigidity of single-particle energy levels of heavy nuclei when the shape parameters are changed systematically, In the two cases of the single-particle Hamiltonian with and without the spin-orbit coupling l.s and square angular momentum l(2) terms, the shape parameter regions are determined respectively, in which both of the spacing distribution and spectral rigidity approach the predictions of the Gaussian orthogonal ensemble of random matrix theory, In both cases it is shown that a considerable octupole-like deformation is necessary to induce the chaotic single-particle motion, Moreover, the occurrence of the chaotic motion not only appears in the heavy nuclei with oblate shapes but also in prolate ones with a proper neck. The neck appreciably influences the occurrence of the chaotic motion when the separation between the two centers is medium or larger It is exhibited that the level repulsion which is strongly related to the nuclear deformation governs the regularity (chaoticity) of the single-particle motion. We find that the l.s term obviously favors the chaotic motion, however, the l(2) term only slightly affects the chaotic motion, In addition, it is implied that when the two terms are taken into account, the chaotic motion occurs even in very elongated nuclei, (C) 1997 Elsevier Science B.V.
部门归属ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA; CHINA INST ATOM ENERGY,BEIJING 102413,PEOPLES R CHINA
关键词Shell-model Statistical Properties Energy-levels Fluctuations Potentials Spectrum Behavior Physics
学科领域Physics
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收录类别SCI
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12409
专题理论物理所SCI论文
通讯作者Gu, JZ , CCAST,WORLD LAB,POB 8730,BEIJING 100080,PEOPLES R CHINA.
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Gu, JZ,Wu, XZ,Zhou, YZ,et al. Quantum chaotic motion of a single particle in heavy nuclei[J]. NUCLEAR PHYSICS A,1997,625(3):621-632.
APA Gu, JZ,Wu, XZ,Zhou, YZ,Zhao, EG,&Gu, JZ , CCAST,WORLD LAB,POB 8730,BEIJING 100080,PEOPLES R CHINA..(1997).Quantum chaotic motion of a single particle in heavy nuclei.NUCLEAR PHYSICS A,625(3),621-632.
MLA Gu, JZ,et al."Quantum chaotic motion of a single particle in heavy nuclei".NUCLEAR PHYSICS A 625.3(1997):621-632.
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