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题名: Giant resonance properties in beta stable and unstable nuclei
作者: Cao, LG ;  Liu, L ;  Chen, BQ ;  Ma, ZY
刊名: ACTA PHYSICA SINICA
出版日期: 2001
卷号: 50, 期号:4, 页码:638-643
关键词: RANDOM-PHASE-APPROXIMATION ;  PION CHARGE-EXCHANGE ;  MEAN-FIELD THEORY ;  FINITE NUCLEI ;  MONOPOLE ;  MATTER ;  MODEL
学科分类: Physics
通讯作者: Cao, LG , Inst Atom Energy, Beijing 102413, Peoples R China.
部门归属: Inst Atom Energy, Beijing 102413, Peoples R China; Natl Lab Heavy Ion Accelerator, Ctr Nucl Theoret Phys, Lanzhou 730000, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We study the giant resonances of stable and unstable nuclei in the framework of the consistent relativistic random phase approximation built on the nonlinear relativistic mean field (RMF) ground states. The isoscalar and isovector modes of giant resonances for stable nuclei, such as Pb-208, Sm-144, Sn-116, Zr-90, Ca-40, O-16 and Ca isotope chains are investigated. The contribution to the giant resonances from the Dirac sea states and the currents of vector mesons are examined. The results show that the effects of the Dirac sea states on the isoscalar giant modes are pronounced, but become weaker for light nuclei, while the contributions of the isovector modes are negligible. The few sets of parameterizations of nonlinear RMF model, which are commonly used to give a good description of ground-state properties of finite nuclei, could also well describe the nuclear dynamic properties-giant resonances. For nuclei with the extreme value of N/Z, low-lying collective excitations are found in isovector dipole modes, which are mainly due to the ph excitation of the weakly bound states near Fermi surface and the isospin mixture effect.
收录类别: SCI
WOS记录号: WOS:000167947700011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12779
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Cao, LG,Liu, L,Chen, BQ,et al. Giant resonance properties in beta stable and unstable nuclei[J]. ACTA PHYSICA SINICA,2001,50(4):638-643.
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