基于第一原理计算的$^{78}$ Ni结构
Structure of $^{78}$Ni from first principles computations
摘要：
双魔核结构简单，是整个核图区域的基石。由于极端的中子-质子比和连续体的接近性，对所谓的双魔法$^{78}$ Ni及其邻居的理论见解是具有挑战性的。我们预测的$J^π=2_1^+$状态的$^{78}$ Ni从相关的$J^π=2_1^+$状态的$^{48}$ Ca使用手性核子核子和三核子相互作用。我们的研究结果证实，$^{78}$镍是双重魔术，和预测的低位态的$^{79,80}$镍打开了许多更稀有的同位素的壳模型研究的方式。
英文摘要：
Doubly magic nuclei have a simple structure and are the cornerstones for entire regions of the nuclear chart. Theoretical insights into the supposedly doubly magic $^{78}$Ni and its neighbors are challenging because of the extreme neutron-to-proton ratio and the proximity of the continuum. We predict the $J^π=2_1^+$ state in $^{78}$Ni from a correlation with the $J^π=2_1^+$ state in $^{48}$Ca using chiral nucleon-nucleon and three-nucleon interactions. Our results confirm that $^{78}$Ni is doubly magic, and the predicted low-lying states of $^{79,80}$Ni open the way for shell-model studies of many more rare isotopes.
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