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Cao, LG; Liu, L; Chen, BQ; Ma, ZY; Cao, LG , Inst Atom Energy, Beijing 102413, Peoples R China.
Giant resonance properties in beta stable and unstable nuclei
Source PublicationACTA PHYSICA SINICA
KeywordRandom-phase-approximation Pion Charge-exchange Mean-field Theory Finite Nuclei Monopole Matter Model
AbstractWe 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.
2001
ISSN1000-3290
Volume50Issue:4Pages:638-643
Subject AreaPhysics
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/12779
Collection理论物理所科研产出_SCI论文
Corresponding AuthorCao, LG , Inst Atom Energy, Beijing 102413, Peoples R China.
Recommended Citation
GB/T 7714
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.
APA Cao, LG,Liu, L,Chen, BQ,Ma, ZY,&Cao, LG , Inst Atom Energy, Beijing 102413, Peoples R China..(2001).Giant resonance properties in beta stable and unstable nuclei.ACTA PHYSICA SINICA,50(4),638-643.
MLA Cao, LG,et al."Giant resonance properties in beta stable and unstable nuclei".ACTA PHYSICA SINICA 50.4(2001):638-643.
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