单极张量相互作用驱动下~（64）Ni的零自旋形状共存
Shape Coexistence at Zero Spin in 64Ni Driven by the Monopole Tensor Interaction
摘要：
半像64 Ni核的低自旋结构得到了相当大的扩展：结合四个实验，在4.5 MeV以下识别出了几个0+和2+激发态，并确定了它们的性质。蒙特卡罗壳模型解释了这些结果，并揭示了一个意外复杂的共存形状：长轴0+激发位于令人惊讶的高能量（3463 keV），集体2+状态高于它286 keV，这是Ni同位素中的第一个这样的观察。穿过中子N = 40的亚壳层间隙的长轴最小值的激发能的演化突出了中子相互作用的影响及其强度随N的变化。
英文摘要：
The low-spin structure of the semimagic 64Ni nucleus has been considerably expanded: combining four experiments, several 0+ and 2+ excited states were identified below 4.5 MeV, and their properties established. The Monte Carlo shell model accounts for the results and unveils an unexpectedly complex landscape of coexisting shapes: a prolate 0+ excitation is located at a surprisingly high energy (3463 keV), with a collective 2+ state 286 keV above it, the first such observation in Ni isotopes. The evolution in excitation energy of the prolate minimum across the neutron N = 40 subshell gap highlights the impact of the monopole interaction and its variation in strength with N.
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