论文标题
建模中子丰富的$^8 $ HE的电偶极强度：多重力集体激发的预测
Modeling the electric dipole strength of neutron-rich $^8$He: Prediction of multineutron collective excitations
论文作者
论文摘要
我们使用$^4 $ He+$ n $+$+$+$+$+$+$+$+$ n $ n $ n $五型型号调查了中子富裕$^8 $ He在电动偶极强度上的多重功能激发。他以复杂的缩放方法获得了$^8 $的多体未结合状态。我们发现，不同的激发模式在偶极强度下的激发能量低于20 meV的偶极力。低于10 MEV的强度来自$^7 $ HE+$ n $频道，表明$^8 $ He的顺序分解通过$^7 $ HE HE共鸣至$^6 $ He+$ n $+$ n $ n $。在10 MEV以上，强度是从具有强构型混合物的多体连续态获得的，这表明具有偶极振荡的四个中子的新集体运动与$^4 $ HE。
We investigate the multineutron excitations of neutron-rich $^8$He in the electric dipole strength using a $^4$He+$n$+$n$+$n$+$n$ five-body model. Many-body unbound states of $^8$He are obtained in the complex scaling method. We found that the different excitation modes coexist in the dipole strength below the excitation energy of 20 MeV. The strength below 10 MeV comes from the $^7$He+$n$ channel, indicating the sequential breakup of $^8$He via the $^7$He resonance to $^6$He+$n$+$n$. Above 10 MeV, the strength is obtained from many-body continuum states with strong configuration mixings, suggesting a new collective motion of four neutrons with the dipole oscillation against $^4$He.
