Nonperturbative shell-model interactions from the in-medium similarity renormalization group.
Nonperturbative shell-model interactions from the in-medium similarity renormalization group.
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DOI：
10.1103/physrevlett.113.142501
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发表时间：
2014-02
影响因子：
8.6
通讯作者：
S. Bogner;H. Hergert;Jason D. Holt;A. Schwenk;S. Binder;A. Calci;J. Langhammer;R. Roth
中科院分区：
文献类型：
--
作者：
S. Bogner;H. Hergert;Jason D. Holt;A. Schwenk;S. Binder;A. Calci;J. Langhammer;R. Roth
利用介质内相似重整化群，基于手征两核子和三核子相互作用，首次从头计算构造了中等质量核的价空间哈密顿量。当应用于氧同位素时，我们发现实验基态能量很好地再现，包括在（24）O处滴线以外的平坦趋势。同样，（21，22，23，24）O的自然宇称谱也与实验一致，我们给出了（25，26）O激发态的预测。结果表现出弱依赖的谐振子基参数和重现光谱内的标准sd价空间。
We present the first ab initio construction of valence-space Hamiltonians for medium-mass nuclei based on chiral two- and three-nucleon interactions using the in-medium similarity renormalization group. When applied to the oxygen isotopes, we find experimental ground-state energies are well reproduced, including the flat trend beyond the drip line at (24)O. Similarly, natural-parity spectra in (21,22,23,24)O are in agreement with experiment, and we present predictions for excited states in (25,26)O. The results exhibit a weak dependence on the harmonic-oscillator basis parameter and reproduce spectroscopy within the standard sd valence space.