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题名: Collective properties of low-lying octupole excitations in Pb-208(82)123, Ca-60(20)40 and O-28(8)20
作者: Zhou, XR ;  Zhao, EG ;  Dong, BG ;  Zhang, XZ ;  Long, GL
刊名: NUCLEAR PHYSICS A
出版日期: 2003
卷号: 723, 期号:40972, 页码:375-386
关键词: DRIP-LINE NUCLEI ;  CORE POLARIZATION ;  RESONANCES ;  STRENGTH
学科分类: Physics
通讯作者: Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China.
部门归属: Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; China Inst Atom Energy, Beijing, Peoples R China; Natl Lab Heavy Ion Accelerator, Ctr Theoret Phys, Lanzhou 730000, Peoples R China
英文摘要: The octupole strengths of three nuclei: beta-stable nucleus Pb-208(82)126, neutron skin nucleus Ca-60(20)40 and neutron drip line nucleus O-28(8)20 are studied by using the self-consistent Hartree-Fock calculation with the random phase approximation. The collective properties of low-lying excitations are analyzed by particle-vibration coupling. The results show that there is the coexistence of the collective excitations and the decoupled strong continuum strength near the threshold in the lowest isoscalar states in Ca-60(20)40 and O-28(8)20. For these three nuclei, both the low-lying isoscalar states and giant isoscalar resonance carry isovector strength. The ratio B(IV)/B(IS) is checked and it is found that, for Pb-208(82)126, the ratio is equal to ((N - Z)/A)(2) in good accuracy, while for Ca-60(20)40 and O-28(8)20, the ratios are much larger than ((N - Z)/A)(2). The study shows that the enhancement of the ratio is due to the excess neutrons that have small binding energies in Ca-60(20)40 and O-28(8)20 (C) 2003 Elsevier Science B.V. All rights reserved.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000183854700004
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内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13243
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:
Zhou, XR,Zhao, EG,Dong, BG,et al. Collective properties of low-lying octupole excitations in Pb-208(82)123, Ca-60(20)40 and O-28(8)20[J]. NUCLEAR PHYSICS A,2003,723(40972):375-386.
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