Theoretical investigation of energy levels and transitions for Pr IV
Theoretical investigation of energy levels and transitions for Pr IV
复制标题
Pr IV 能级和跃迁的理论研究
DOI：
10.1093/mnras/stac2401
复制
发表时间：
2022
影响因子：
4.8
通讯作者：
Radziute L
中科院分区：
文献类型：
--
作者：
Gaigalas G;Rynkun P;Banerjee S;Tanaka M;Kato D;Radziute L
我们给出了Priv的广泛能级（1110能级）和跃迁数据。我们还展示了这些原子数据对中子星（NS）合并不透明度的影响。利用基于多组态Dirac-Hartree-Fock和相对论组态相互作用方法的GRASP2018软件包进行能谱和跃迁数据计算。利用GRASP2018数据，计算了含纯Pr的NS合并抛射物的不透明度。将能级与NIST原子光谱数据库和其他可用作品中的推荐值进行比较。此外，电偶极子（E1）跃迁数据、线强度、加权振荡器强度和跃迁率在上述水平之间计算。我们估计了计算线强度的不确定性，给出了精度等级。并与其它理论计算结果进行了比较。我们提出了几种方法来估计E1跃迁的线强度的不确定性。我们对NS合并抛射的典型条件下的不透明度计算表明，Pr3 +的普朗克平均不透明度达到了k。由于原子数据的完整性更高，因此不透明度高于以往的研究。我们还强调了准确的原子数据对不透明度的重要性，并将其与使用HULLAC原子计算的不透明度进行了比较。此外，我们还确定了重要的构型，特别是3+电离镧系元素的不透明度在高能级之间的转变。
We present extensive energy levels (1110 levels) and transition data for the Priv. We also show the effect of such atomic data on opacity for neutron star (NS) merger. We performed energy spectra and transition data calculations using the GRASP2018 package, which is based on the multiconfiguration Dirac–Hartree–Fock and relativistic configuration interaction methods. Using the GRASP2018 data, the opacities in the NS merger ejecta containing pure Pr are calculated. Energy levels are compared with recommended values from the NIST Atomic Spectra Database and other available works. Furthermore, electric dipole (E1) transition data, line strengths, weighted oscillator strengths, and transition rates are computed between the above levels. We estimate the uncertainties of the computed line strengths giving the accuracy class. The computed line strengths are also compared with other theoretical computations. We proposed few ways to estimate the uncertainties of the line strengths of the E1 transitions. Our calculation for opacity for a typical condition of NS merger ejecta att∼ 1 d shows that the Planck mean opacity of Pr3 +reachesatK. The opacity is higher than that by the previous studies, thanks to the higher completeness of the atomic data. We also highlight the importance of accurate atomic data for the opacity by comparing it with the opacity using the atomic calculation from HULLAC. Moreover, we identify the important configurations, especially for the transitions between the high-lying levels for the opacity of 3+ionized lanthanides.