轻丰中子核的壳模型计算

Shell Model Calculations for Light Neutron-Rich Nuclei

对９≤Ａ≤１４，３≤Ｚ≤５的核进行了壳模型计算．以８Ｈｅ作为ｃｏｒｅ，选用修正的表面δ相互作用（ＭＳＤＩ）作为残余相互作用，挑选了２４个实验能谱数据，定出了ＭＳＤＩ的参数和单粒子能量，并计算了结合能、低激发谱、电磁性质等，得到与实验较符合的结果．并着重讨论了＂Ｂｅ的宇称反转和ｈａｌｏ结构的物理机理．计算程序为ＯＸＢＡＳＨ．

A shell model calculation is carried out for nuclei with 9≤A≤14 and 3≤Z≤5. In the calculation 8He is treated as a core. The data for 24 experimental energy spectra are selected to determine the parameters of the modified surface δinteraction (MSDI) and the single-particle energies. The RMS=0.72MeV. Then the binding energies, the low-lying excited energy spectra and the electromagnetic properties are calculated and the results are in good agreement with experiment in general. The micromechanism of the halo structure and the parity conversion of the 11Be are discussed in detail. This work is carried out with the OXBASH code.