已知最轻的锡同位素中的轨道相关核子配对
Orbital dependent nucleonic pairing in the lightest known isotopes of tin
摘要：
通过对109 ~* → 105 ~* Te → 101 ~* Sn超允许α衰变链的研究，我们观察到了双幻~（100）Sn外的单中子系统~（101）Sn的低激发态。我们发现101 Sn的基态（J = 7=2）和第一激发态（J = 5=2）的自旋与传统的103 Sn和更重的锡同位素的能级顺序相反。通过简单的参数和国家的最先进的壳模型计算，我们解释这个意想不到的开关从单粒子制度的过渡到集体模式，其中轨道依赖的配对相关性，占主导地位。
英文摘要：
By studying the 109Xe-->105Te-->101Sn superallowed alpha-decay chain, we observe low-lying states in 101Sn, the one-neutron system outside doubly magic 100Sn. We find that the spins of the ground state (J = 7=2) and first excited state (J = 5=2) in 101Sn are reversed with respect to the traditional level ordering postulated for 103Sn and the heavier tin isotopes. Through simple arguments and state-of-the-art shell model calculations we explain this unexpected switch in terms of a transition from the single-particle regime to the collective mode in which orbital-dependent pairing correlations, dominate.
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