论文标题
在Pygmy偶极共振的能量区域中的边缘 - 轴假设的综合测试
Comprehensive test of the Brink-Axel hypothesis in the energy region of the pygmy dipole resonance
论文作者
论文摘要
边缘 - 轴假设的有效性对于众多天体物理计算特别重要，通过三种独立的实验方法，以低于中子分离能的116,120,124SN解决了116,120,124SN。使用OSLO方法充电的粒子反应后，从主要$γ$ - decay光谱中提取的$γ$ ray强度函数（GSF）和形状方法与相关束能量上向前角无弹性质子散射所推论的那些相当一致。另外，GSF被证明与初始和最终状态的激发能和旋转无关。该结果对重核中的广义边缘 - 轴假设提供了批判性检验，证明了其在侏儒偶极子共振的能量区域的适用性。
The validity of the Brink-Axel hypothesis, which is especially important for numerous astrophysical calculations, is addressed for 116,120,124Sn below the neutron separation energy by means of three independent experimental methods. The $γ$-ray strength functions (GSFs) extracted from primary $γ$-decay spectra following charged-particle reactions with the Oslo method and with the Shape method demonstrate excellent agreement with those deduced from forward-angle inelastic proton scattering at relativistic beam energies. In addition, the GSFs are shown to be independent of excitation energies and spins of the initial and final states. The results provide a critical test of the generalized Brink-Axel hypothesis in heavy nuclei, demonstrating its applicability in the energy region of the pygmy dipole resonance.
