Effect of Wigner energy on the symmetry energy coefficient in nuclei
文献类型：期刊论文
| 作者 | Tian, JL; Cui, HT; Gao, T; Wang, N; Tian, JL (reprint author), Anyang Normal Univ, Sch Phys & Elect Engn, Anyang 455000, Peoples R China. |
| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2016 |
| 卷号 | 40期号:9页码:94101 |
| 关键词 | Symmetry Energy Wigner Energy Binding Energy Isobaric Nuclei |
| DOI | http://dx.doi.org/10.1088/1674-1137/40/9/094101 |
| 英文摘要 | The nuclear symmetry energy coefficient (including the coefficient a(sym)((4)) of the I-4 term) of finite nuclei is extracted by using the differences of available experimental binding energies of isobaric nuclei. It is found that the extracted symmetry energy coefficient a(sym)*(A, I) decreases with increasing isospin asymmetry I, which is mainly caused by Wigner correction, since e(sym)* is the summation of the traditional symmetry energy e(sym) and the Wigner (energy ew. We obtain the optimal values J = 30.25 0.10 MeV, a(ss) = 56.18 +/- 1.25 MeV, a(sym)((4)) = 8.33 +/- 1.21 MeV and the Wigner parameter x = 2.38 +/- 0.12 through a polynomial fit to 2240 measured binding energies for nuclei with 20 <= A <= 261 with an rms deviation of 23.42 keV. We also find that the volume symmetry coefficient J similar or equal to 30 MeV is insensitive to the value x, whereas the surface symmetry coefficient a(ss) and the coefficient a(sym)((4)) are very sensitive to the value of x in the range 1 <= x <= 4. The contribution of the a(sym)((4)) term increases rapidly with increasing isospin asymmetry I. For very neutron-rich nuclei, the contribution of the asym(4) term will play an important role. |
| 学科主题 | Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/21548]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Tian, JL (reprint author), Anyang Normal Univ, Sch Phys & Elect Engn, Anyang 455000, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Tian, JL,Cui, HT,Gao, T,et al. Effect of Wigner energy on the symmetry energy coefficient in nuclei[J]. CHINESE PHYSICS C,2016,40(9):94101. |
| APA | Tian, JL,Cui, HT,Gao, T,Wang, N,&Tian, JL .(2016).Effect of Wigner energy on the symmetry energy coefficient in nuclei.CHINESE PHYSICS C,40(9),94101. |
| MLA | Tian, JL,et al."Effect of Wigner energy on the symmetry energy coefficient in nuclei".CHINESE PHYSICS C 40.9(2016):94101. |
入库方式： OAI收割
来源：理论物理研究所
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