Effect of resonant continuum on pairing correlations in the relativistic approach

doi:10.1140/epja/i2004-10029-5

	Effect of resonant continuum on pairing correlations in the relativistic approach
	Cao, LG ; Ma, ZY
刊名	EUROPEAN PHYSICAL JOURNAL A
	2004-11
卷号	22 页码:189-197
ISSN号	1434-6001
DOI	10.1140/epja/i2004-10029-5
英文摘要	A proper treatment of the resonant continuum is to take account of not only the energy of the resonant state, but also its width. The effect of resonant states on pairing correlations is presented in the framework of the relativistic mean-field theory plus Bardeen-Cooper-Schrieffer (BCS) approximation with a constant pairing strength. The study is performed in an effective Lagrangian with the parameter set NU for neutron-rich even-even Ni isotopes. Results show that the contribution of the proper treatment of the resonant continuum to pairing correlations for those nuclei close to the neutron drip line is important. The pairing gaps, Fermi energies, pairing correlation energies, and binding energies are considerably affected by a proper consideration of the width of resonant states. The problem of unphysical particle gas, which may appear in the calculation of the traditional mean field plus BCS method for nuclei in the vicinity of the drip line could be well overcome when the pairing correlation is performed by using the resonant states instead of the discretized states in the continuum.
WOS关键词	GROUND-STATE PROPERTIES ; MEAN-FIELD THEORY ; RANDOM-PHASE-APPROXIMATION ; DRIP-LINE ; NUCLEI
WOS研究方向	Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000225820800005
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/57123]
专题	中国科学院近代物理研究所
通讯作者	Cao, LG
作者单位	1.Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China 2.China Inst Atom Energy, Beijing 102413, Peoples R China 3.CCAST, Beijing 100080, Peoples R China 4.Natl Lab Heavy Ion Accelerator Lanzhou, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China 5.Inst Theoret Phys, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Cao, LG,Ma, ZY. Effect of resonant continuum on pairing correlations in the relativistic approach[J]. EUROPEAN PHYSICAL JOURNAL A,2004,22:189-197.
APA	Cao, LG,&Ma, ZY.(2004).Effect of resonant continuum on pairing correlations in the relativistic approach.EUROPEAN PHYSICAL JOURNAL A,22,189-197.
MLA	Cao, LG,et al."Effect of resonant continuum on pairing correlations in the relativistic approach".EUROPEAN PHYSICAL JOURNAL A 22(2004):189-197.