Microscopic self-consistent study of neon halos with resonant contributions
文献类型：期刊论文
| 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 |
| ISSN号 | 0370-2693 |
| 通讯作者 | Zhang, SS (reprint author), Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China. |
| 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. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | 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) |
| 原文出处 | http://dx.doi.org/10.1016/j.physletb.2014.01.023 |
| 语种 | 英语 |
| WOS记录号 | WOS:000333506400006 |
| 公开日期 | 2015-06-03 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/15810]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | 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. |
| APA | Zhang, SS,Smith, MS,Kang, ZS,&Zhao, J.(2014).Microscopic self-consistent study of neon halos with resonant contributions.PHYSICS LETTERS B,730(-),30-35. |
| MLA | Zhang, SS,et al."Microscopic self-consistent study of neon halos with resonant contributions".PHYSICS LETTERS B 730.-(2014):30-35. |
入库方式： OAI收割
来源：理论物理研究所
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