基于中子分离能的分析, Ozawa 等提出丰中子轻核存在新幻数N=16. 对N=16同中子素进行了形变和球形的相对论平均场计算. 相对论平均场的数值结果表明N=16同中子素有形状相变. 这是一些丰中子核新幻数出现的可能原因.
Based on the analysis of neutron-separation energies, Ozawa et al proposed a new magic number N=16 in light neutron-rich nuclei. The deformed and spherical relativistic mean-field(RMF) calculations have been carried out for N=16 isotones. The numerical re lativistic mean-field results show there is a shape transition in N=16 isotones. This is the possible cause of the appearance of the new magic number in someneutron-rich nuclei.
参考文献
| [1] | Tanihata I, Kobayashi T, Yamakawa O, et al. Measurement of Interaction Cross Sections using Isotope Beams of Be and B and Isospin Dependence of the Nuclear Radii [J]. Phys Lett, 1988, B206: 592-596. |
| [2] | Hansen P G, Jonson B. The Neutron Halo of Extremely Neutron-rich Nuclei [J]. Euro Phys Lett, 1987, 4: 409-414. |
| [3] | Mittig W, Chouvel J M, Zhan Wen Long, et al.Measurement of Total Reaction Cross Sections of Exotic Neutron-rich Nuclei [J]. Phys Rev Lett, 1987, 59: 1 889-1 891. |
| [4] | Ren Zhongzhou, Xu Gongou. Sh ort-range Correlations in Light Nuclei near the Neutron-drip Line [J].Phys Lett, 1990, B237: 1-2. |
| [5] | Ren Zhongzhou, Xu Gongou. A three-body Model of11Li, 14Be, and 17B [J]. Phys Lett, 1990, B252: 311-313. |
| [6] | Utsuno Y, Otsuka T, Mizusaki T, et al.Varying Shell Gap and Deformation in N≈20 Unstable Nuclei [J].Phys Rev, 1999, C60: 054315-1-054315-8. |
| [7] | Ren Zhongzhou, Chen Bao-qiu, Ma Zhongyu, et al.One-proton Halo in 26P and Two-proton Halos in27S [J]. Phys Rev C, 1996, C53: R572-R575. |
| [8] | Brown B A, IIansen P G. Proton Halos in the 1s0d Sh ell [J]. Phys Lett, 1996, B381: 391-396. |
| [9] | Navin A, Bazin D, Brown B A, et al. Spectroscopy o f Radioactive Beams from Single-nucleon Knockout Reactions: Application to the sd shell nuclei 25Al and26,27,28P [J].Phys Rev Lett, 1998, 81: 5 089-5 092. |
| [10] | Fang Deqing, Shen Wenqing,Feng Jun, et al. Measurement of Total Reaction Cross Sections for Exotic Nuclei Close to the Proton Drip Line at Intermediate Energies and Observation of a Proton Halo in 27P [J]. Chin Phys Lett, 2001, 8: 1 033-1 036. |
| [11] | Ren Zhongzhou, Mittig W, Chen Baoqiu, et al. Neutron Halo and Spin-orbit Splittings in Some Neutron-rich Nuclei [J]. Phys Rev, 1995, C52: R1 764-R1 767. |
| [12] | Zhu Z Y, Shen W Q, Cai Y H, et al. Study of Halo Nuclei with Phenomenological Realistic Mean-field Approach [J].Phys Lett, 1994, B328: 1-4. |
| [13] | Sugahara Y, Toki H. Relativistic Mean-field Theory for Unstable Nuclei with Nonlinear σ and ω terms [J].Nucl Phys, 1994, A579: 557-572. |
| [14] | Audi G, Wapstra A H. The 1993 Atomic Mass Evaluation [ J]. Nucl Phys, 1993, A565: 1-397. |
| [15] | Suzuki T, Kanungo R, Bochkarev O, et al.Nuclear Radii of 17,19B and 14Be [J]. Nucl Phys, 2000, A668: 313-326. |
| [16] | Sarazin F, Savajols H, Mittig W, et al.Shape Coexistence and the N=28 Shell Closure far from Stability [J].Phys Rev Lett, 2000, 84: 5 062-5 065. |
| [17] | Ozawa A, Kobayashi T, Suzuki T, et al. New Magic Numb er, N=16, near the Neutron Drip Line [J]. Phy Rev Lett, 2000, 84: 5 493-5 495. |
| [18] | Ozawa A, Kobayashi T, Suzuki T, et al.New Magic Number, N=16, near the Neutron Drip Line [J].Phys Rev Lett, 2000, 84: 5 493-5 496. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%