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题名: Microscopic self-consistent study of neon halos with resonant contributions
作者: Zhang, SS;  Smith, MS;  Kang, ZS;  Zhao, J
刊名: PHYSICS LETTERS B
出版日期: 2014
卷号: 730, 期号:-, 页码:30-35
关键词: HARTREE-BOGOLIUBOV THEORY ;  NEUTRON DRIP-LINE ;  PLUS BCS APPROACH ;  MEAN-FIELD THEORY ;  PAIRING CORRELATIONS ;  LIGHT-NUCLEI ;  GIANT HALO ;  CONTINUUM ;  ISOTOPES ;  PROTON
学科分类: Physics
DOI: 10.1016/j.physletb.2014.01.023
通讯作者: Zhang, SS (reprint author), Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China.
部门归属: [Zhang, Shi-Sheng
英文摘要: Recent reaction measurements have been interpreted as evidence of a halo structure in the exotic neutron-rich isotopes Ne-29,Ne-31. While theoretical studies of Ne-31 generally agree on its halo nature, they differ significantly in their predictions of its properties and underlying cause (e.g., that Ne-31 has an inverted ordering of p-f orbitals). We have made a systematic theoretical analysis of possible Neon halo signatures - the first using a fully microscopic, relativistic mean field approach that properly treats positive energy orbitals (such as the valence neutron in Ne-31) self-consistently with bound levels, as well as the pairing effect that keeps the nucleus loosely bound with negative Fermi energy. Our model is the analytical continuation of the coupling constant (ACCC) method based on a relativistic mean field (RMF) theory with Bardeen-Cooper-Schrieffer (BCS) pairing approximation. We calculate neutron- and matter-radii, one-neutron separation energies, p- and f-orbital energies and occupation probabilities, and neutron densities for single-particle resonant orbitals in Ne27-31. We analyze these results for evidence of neutron halo formation in Ne-29,Ne-31. Our model predicts a p-orbit in halo structure for Ne-31, based on a radius increase from Ne-30 that is 7-8 times larger than the increase from Ne-29 to Ne-30, as well as a decrease in the neutron separation energy by a factor of similar to 10 compared to that of Ne27-30. In contrast to some other studies, our inclusion of resonances yields an inverted ordering of p and f orbitals for spherical and slightly deformed nuclei. Furthermore, we find no evidence of an s-orbit in halo in Ne-29 as recently claimed in the literature. (C) 2014 The Authors. Published by Elsevier B.V.
资助者: Beihang New Star, National Natural Science Foundation of China [11375022, 11035007, 11235002]; U.S. Dept. of Energy, Office of Nuclear Physics; Chinese U.S Theory Institute for the Physics of Exotic Nuclei (CUSTIPEN)
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000333506400006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15810
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Recommended Citation:
Zhang, SS,Smith, MS,Kang, ZS,et al. Microscopic self-consistent study of neon halos with resonant contributions[J]. PHYSICS LETTERS B,2014,730(-):30-35.
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