1+3准粒子-核心振动耦合模型对^(11)Be的应用

Application of 1+3 Quasiparticle-vibration Coupling Model to ^(11)Be

利用1+3准粒子-核心四极振动耦合模型研究了11Be核的能级结构,再现了其他模型在4 MeV处缺失的能级,理论结果与实验符合较好.计算结果表明,11Be的低激发谱一些能级是1+3准粒子运动与核心8Be的表面集体振动相耦合的结果.11Be的中子晕结构也得到合理的解释.

The low-lying excitation spectra of ^11Be was calculated on the basis of 1 ＋ 3 quasiparticle-vibration coupling model. Experimentally observed 4 MeV excited state of ＂Be has been reprouduced, and the results are in good agreement with experiments. The calculation result shows that some of the low-lying excited levels of ^11Be are caused by coupling of 1 ＋3 quasiparticles with even-even vibrating core ^8Be. The halo structure of ^11Be is also explained reasonably.