论文标题
$^{161-163} $ dy nuclei的辐射强度函数的精确处理在辐射强度函数中的作用
Role of exact treatment of thermal pairing in radiative strength functions of $^{161-163}$Dy nuclei
论文作者
论文摘要
在低$γ$ -Rays Energy（$e_γ\ LEQ 12 $ MEV）区域中辐射强度功能（RSF）的增强，是由Pygmy偶极共振（PDR）引起的，在声子湿模型（PDM）和精确的热配对（EP）中在没有添加任何额外的PDR强度功能的情况下进行了处理。针对$^{161-163} $ dy执行的数值计算表明，由于EP的影响，EP+PDM可以很好地描述$γ$ rays的低能和高能区域中的总RSF数据。因此，与现象学广义Lorentzian（GLO）和标准Lorentzian（SLO）模型中的常规描述相比，EP+PDM计算可以消除至少八个免费参数。这表明了微观方法对RSF的精确描述的重要作用。特别地，发现温度对低于中子分离能的RSF具有显着贡献，再次质疑该能量区域中边缘轴假设的有效性。
The enhancement of radiative strength function (RSF) in the region of low $γ$-rays energy ($E_γ\leq 12$ MeV), which is caused by the pygmy dipole resonance (PDR), is treated within the phonon damping model (PDM) plus exact thermal pairing (EP) without adding any extra PDR strength function. The numerical calculations performed for $^{161-163}$Dy show that, because of the effect of EP, the EP+PDM can describe reasonably well the total RSF data in both low- and high-energy regions of $γ$-rays. Consequently, as compared to the conventional description within the phenomenological generalized Lorentzian (GLO) and standard Lorentzian (SLO) models, the EP+PDM calculations can eliminate at least eight free parameters. This indicates the important role of microscopic approaches towards the precise description of the RSF. In particular, temperature is found to have significant contributions to the RSF below the neutron separation energy, questioning again the validity of the Brink-Axel hypothesis in this energy region.
