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Collective properties of low-lying octupole excitations in Pb-208(82)123, Ca-60(20)40 and O-28(8)20
Zhou, XR; Zhao, EG; Dong, BG; Zhang, XZ; Long, GL; Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China.
2003
发表期刊NUCLEAR PHYSICS A
ISSN0375-9474
卷号723期号:40972页码:375-386
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.
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
关键词Drip-line Nuclei Core Polarization Resonances Strength
学科领域Physics
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收录类别SCI
WOS记录号WOS:000183854700004
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13243
专题理论物理所1978-2010年知识产出
通讯作者Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China.
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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.
APA Zhou, XR,Zhao, EG,Dong, BG,Zhang, XZ,Long, GL,&Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China..(2003).Collective properties of low-lying octupole excitations in Pb-208(82)123, Ca-60(20)40 and O-28(8)20.NUCLEAR PHYSICS A,723(40972),375-386.
MLA Zhou, XR,et al."Collective properties of low-lying octupole excitations in Pb-208(82)123, Ca-60(20)40 and O-28(8)20".NUCLEAR PHYSICS A 723.40972(2003):375-386.
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