First Observation of the Four-Proton Unbound Nucleus Mg-18
文献类型：期刊论文
| 作者 | Jin, Y.1,2; Niu, C. Y.3; Brown, K. W.3,4; Li, Z. H.1,2; Hua, H.1,2; Anthony, A. K.3,5; Barney, J.3,5; Charity, R. J.6; Crosby, J.3,5; Dell'Aquila, D.3 |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2021-12-22 |
| 卷号 | 127期号:26页码:6 |
| ISSN号 | 0031-9007 |
| DOI | 10.1103/PhysRevLett.127.262502 |
| 通讯作者 | Brown, K. W.(brownk@nscl.msu.edu) |
| 英文摘要 | Mg-18 was observed, for the first time, by the invariant-mass reconstruction of O-14 + 4p events. The ground-state decay energy and width are E-T = 4.865(34) MeV and Gamma = 115(100) keV, respectively. The observed momentum correlations between the five particles are consistent with two sequential steps of prompt 2p decay passing through the ground state of Ne-16. The invariant-mass spectrum also provides evidence for an excited state at an excitation energy of 1.84(14) MeV, which is likely the first excited 2(+) state. As this energy exceeds that for the 2(+) state in Mg-20, this observation provides an argument for the demise of the N = 8 shell closure in nuclei far from stability. However, in open systems this classical argument for shell strength is compromised by Thomas-Ehrman shifts. |
| WOS关键词 | SHELL STRUCTURE ; STATE |
| 资助项目 | National Key R&D Program of China[2018YFA0404403] ; National Natural Science Foundation of China[12035001] ; National Natural Science Foundation of China[11775003] ; National Natural Science Foundation of China[11975282] ; National Natural Science Foundation of China[11775316] ; U.S. Department of Energy, Office of Science, Office of Nuclear Physics[DE-FG02-87ER-40316] ; U.S. National Science Foundation[PHY-1565546] ; State Key Laboratory of Nuclear Physics and Technology, Peking University[NPT2020KFY13] ; China Scholarship Council[201806010506] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000744572600005 |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China ; U.S. Department of Energy, Office of Science, Office of Nuclear Physics ; U.S. National Science Foundation ; State Key Laboratory of Nuclear Physics and Technology, Peking University ; China Scholarship Council |
| 源URL | [http://119.78.100.186/handle/113462/142287]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Brown, K. W. |
| 作者单位 | 1.Peking Univ, Sch Phys, Beijing 100871, Peoples R China 2.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 3.Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA 4.Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA 5.Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA 6.Washington Univ, Dept Chem, St Louis, MO 63130 USA 7.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 8.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China 9.Washington Univ, Dept Phys, St Louis, MO 63130 USA 10.Fudan Univ, Inst Modern Phys, Shanghai 200433, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jin, Y.,Niu, C. Y.,Brown, K. W.,et al. First Observation of the Four-Proton Unbound Nucleus Mg-18[J]. PHYSICAL REVIEW LETTERS,2021,127(26):6. |
| APA | Jin, Y..,Niu, C. Y..,Brown, K. W..,Li, Z. H..,Hua, H..,...&Zhu, K..(2021).First Observation of the Four-Proton Unbound Nucleus Mg-18.PHYSICAL REVIEW LETTERS,127(26),6. |
| MLA | Jin, Y.,et al."First Observation of the Four-Proton Unbound Nucleus Mg-18".PHYSICAL REVIEW LETTERS 127.26(2021):6. |
入库方式： OAI收割
来源：近代物理研究所
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