Semi-empirical model potential calculations of excitation energies, fine structure splittings, oscillator strengths and line strengths ratios were computed for high Rydberg transitions in principal, sharp and diffuse series of thallium one-electron spectrum with allowance for core–valence electron correlations in core polarization picture. Relativistic effects are fully included through solving Dirac equations and core–valence electron correlation is represented in core polarization picture by appropriate term in model potential optimized to reproduce ionization energies of the system for lowest states of given $|nlj〉$ symmetry. The dipole-moment operator of transition is modified in accordance. Systematic trends are investigated in line strength ratios and oscillator strengths along the spectral series, the latter showing hydrogen-like behavior for large n* effective quantum number of upper states of transition. The influence of core–valence correlation (core polarization) on line strength ratios and oscillator strengths along the spectral series is studied in detail demonstrating its importance even for transitions to highly excited Rydberg states with $n=20$. The strong effect of cancellation of positive and negative contributions to transition matrix element was observed for oscillator strengths and line strength ratios in principal series of thallium spectrum.

针对high一电子谱的主要，尖锐和扩散系列的高里德伯格跃迁，计算了激发能，精细结构分裂，振荡器强度和线强度比的半经验模型电势计算，并考虑了磁极极化中的核价电子相关性图片。通过解决Dirac方程，相对论效应被完全包括在内，并且在模型极化电势中，通过适当的术语来表示核-价电子相关性，在模型中通过适当的项来表示核极化图片，该模型势能在给定的最低状态下重现系统的电离能$|ñ升Ĵ〉$对称。跃迁的偶极矩算符根据进行了修改。研究了沿谱系列的线强度比和振荡器强度的系统趋势，后者显示了较大的n *有效量子数的较高跃迁态的类氢行为。详细研究了核-价相关性（核极化）对沿谱系列的线强度比和振荡器强度的影响，表明了其重要性，即使对于跃迁到高激发的里德堡态也是如此。$ñ=20$。在oscillator光谱的主要序列中观察到了振荡器强度和线强度比，抵消了对过渡矩阵元素的正负贡献的强烈影响。