Pygmy and giant dipole resonances in Ni isotopes

doi:10.1103/PhysRevC.75.054320

	Pygmy and giant dipole resonances in Ni isotopes
	Liang, Jun ; Cao, Li-Gang ; Ma, Zhong-Yu
刊名	PHYSICAL REVIEW C
	2007-05-01
卷号	75 页码:6
ISSN号	0556-2813
DOI	10.1103/PhysRevC.75.054320
英文摘要	The isovector giant and pygmy dipole resonances in even-even Ni isotopes are studied within the framework of a fully consistent relativistic random-phase approximation built on the relativistic mean field ground state. An additional isoscalar-isovector nonlinear coupling term is adopted in the standard effective mean field Lagrangian, which could modify the density dependence of the symmetry energy and soften the symmetry energy at the saturation density without changing the agreement with experimentally existing data of ground state properties. We found that the centroid energy of the isovector giant dipole resonance is tightly correlated to the neutron skin thickness. In contrast, the centroid energy of the isovector pygmy resonance is insensitive to the density dependence of the symmetry energy by tuning the isoscalar-isovector nonlinear coupling.
WOS关键词	MEAN-FIELD THEORY ; NEUTRON RADII ; NUCLEI ; STRENGTH ; DENSITY ; MODELS
WOS研究方向	Physics
语种	英语
出版者	AMERICAN PHYSICAL SOC
WOS记录号	WOS:000246891100030
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/28054]
专题	中国科学院近代物理研究所
通讯作者	Liang, Jun
作者单位	1.China Inst Atom Energy, Beijing 102413, Peoples R China 2.Taiyuan Univ Technol, Dept Phys, Taiyuan 030024, Peoples R China 3.Natl Lab Heavy Ion Accelerator Lanzhou, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Liang, Jun,Cao, Li-Gang,Ma, Zhong-Yu. Pygmy and giant dipole resonances in Ni isotopes[J]. PHYSICAL REVIEW C,2007,75:6.
APA	Liang, Jun,Cao, Li-Gang,&Ma, Zhong-Yu.(2007).Pygmy and giant dipole resonances in Ni isotopes.PHYSICAL REVIEW C,75,6.
MLA	Liang, Jun,et al."Pygmy and giant dipole resonances in Ni isotopes".PHYSICAL REVIEW C 75(2007):6.