Bogner S K, Hergert H, Holt J D, Schwenk A, Binder S, Calci A, Langhammer J, Roth R
Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48844, USA.
Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
Phys Rev Lett. 2014 Oct 3;113(14):142501. doi: 10.1103/PhysRevLett.113.142501.
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.
我们展示了基于手征两体和三体核子相互作用，利用介质中的相似重整化群，首次对中等质量核的价空间哈密顿量进行的从头计算构建。当应用于氧同位素时，我们发现实验基态能量得到了很好的再现，包括在(^{24}O)处滴线以外的平缓趋势。同样，(^{21,22,23,24}O)中的自然宇称谱与实验结果一致，并且我们给出了(^{25,26}O)中激发态的预测。结果显示出对谐振子基参数的弱依赖性，并在标准(sd)价空间内再现了光谱。
