Shell evolution and nuclear forces
Shell evolution and nuclear forces
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DOI：
10.1016/j.physletb.2010.02.051
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发表时间：
2010-03
影响因子：
4.4
通讯作者：
N. Smirnova;B. Bally;K. Heyde;F. Nowacki;K. Sieja
中科院分区：
文献类型：
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作者：
N. Smirnova;B. Bally;K. Heyde;F. Nowacki;K. Sieja
我们定量地研究了表征核子-核子相互作用的不同成分在核壳结构演化中所起的作用。它基于有效的两体壳-模型相互作用的自旋-张量分解，以及随后对一系列同位素或同素中的有效单粒子能量变化的研究。该技术允许明确地分离现实有效交互的中心分量、矢量分量和张量分量的贡献。我们发现，虽然单粒子能量的全局变化是由有效相互作用的中心分量引起的，但最近注意到的自旋-轨道伙伴的特征行为主要是由于它的张量部分。基于sdpf壳层模型空间中的一个很好的现实相互作用的分析，我们详细地分析了不同项在丰中子核中N=16、N=20和N=28壳隙的形成和消失中所起的作用。
We present a quantitative study of the role played by different components characterizing the nucleon–nucleon interaction in the evolution of the nuclear shell structure. It is based on the spin–tensor decomposition of an effective two-body shell-model interaction and the subsequent study of effective single-particle energy variations in a series of isotopes or isotones. The technique allows to separate unambiguously contributions of the central, vector and tensor components of the realistic effective interaction. We show that while the global variation of the single-particle energies is due to the central component of the effective interaction, the characteristic behavior of spin–orbit partners, noticed recently, is mainly due to its tensor part. Based on the analysis of a well-fitted realistic interaction in the sdpf shell-model space, we analyze in detail the role played by the different terms in the formation and/or disappearance of N=16, N=20 and N=28 shell gaps in neutron-rich nuclei.