Three-body model calculation of the 2 + state in O26
Three-body model calculation of the 2 + state in O26
复制标题
O26中2态的三体模型计算
DOI：
10.1103/physrevc.90.027303
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
H. Sagawa
中科院分区：
文献类型：
--
作者：
K. Hagino;H. Sagawa
本文用三体模型$^{24}$O+$n$+$n$讨论了未束缚核$^{26}$O中激发态2$^+$的能量。该模型充分考虑了价中子的连续效应和双中子关联。目前的计算得出的能量为1.354 MeV，略小于未扰动能量1.54 MeV。基态和2$^+$态相对于未微扰能量的能量位移表明，$^{26}$O中的0$^+$和2$^+$态显示出一个典型的能谱，该能谱可以很好地用作用于同一轨道上的两个价核子的短程配对相互作用来描述。
We discuss the energy of the excited 2$^+$ state in the unbound nucleus $^{26}$O using the three-body model of $^{24}$O+$n$+$n$. This model fully takes into account the continuum effects as well as the dineutron correlation of the valence neutrons. The present calculation yields the energy of 1.354 MeV, which is slightly smaller than the unperturbed energy, 1.54 MeV. The energy shifts for the ground and the 2$^+$ states with respect to the unperturbed energy suggest that 0$^+$ and the 2$^+$ states in $^{26}$O show a typical spectrum well described by a short-range pairing interaction acting on two valence nucleons in the same orbit.