Giant resonance properties in beta stable and unstable nuclei
文献类型：期刊论文
| 作者 | Cao, LG; Liu, L; Chen, BQ; Ma, ZY; Cao, LG , Inst Atom Energy, Beijing 102413, Peoples R China. |
| 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 |
| ISSN号 | 1000-3290 |
| 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. |
| 学科主题 | Physics |
| WOS记录号 | WOS:000167947700011 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/12779]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Cao, LG , Inst Atom Energy, Beijing 102413, Peoples R China. |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：理论物理研究所
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