The 2s<em>n</em>p threshold energy (<em>E</em>_limit) and quantum defect δ of ³P₁ and ¹P₁ states of Ar⁸⁺, Fe¹⁶⁺, Kr²⁶⁺ and Xe⁴⁴⁺ ions

<b>Table 5.</b> The 2s<em>n</em>p threshold energy (<em>E</em>_limit) and quantum defect δ of ³P₁ and ¹P₁ states of Ar⁸⁺, Fe¹⁶⁺, Kr²⁶⁺ and Xe⁴⁴⁺ ions. <strong>Abstract</strong> Photoionization (PI) cross sections of the ground state 1s² 2s² 2p⁶¹ S₀ of Ne-like Ar⁸⁺, Fe¹⁶⁺, Kr²⁶⁺ and Xe⁴⁴⁺ ions are calculated by using the Dirac atomic <em>R</em>-matrix code based on a fully relativistic <em>R</em>-matrix method. To analyze the detailed resonant structure, systematical calculations based on the multiconfiguration Dirac–Fock method are performed for the dominant 2s → <em>n</em>p resonant transitions, and the resonant energies, strengths and total natural widths are presented. The resonant structures and characteristics of the PI cross sections and resonance strengths along the Ne-like sequence are discussed with emphasis on the influence of relativistic effects. For the Ar⁸⁺ ion, good agreement is found between the present results and available theoretical calculations and experimental data.表5。氩8+（Ar⁸⁺）、铁16+（Fe¹⁶⁺）、氪26+（Kr²⁶+）与氙44+（Xe⁴⁴+）离子的³P₁及¹P₁态的2s→np阈值能（E_limit）与量子亏损δ。**摘要** 本文基于完全相对论R矩阵（R-matrix）方法，利用狄拉克原子R-矩阵代码（Dirac atomic R-matrix code），计算了类氖（Ne-like）氩8+、铁16+、氪26+及氙44+离子基态1s²2s²2p⁶¹S₀的光电离（Photoionization，简称PI）截面。为剖析精细共振结构，针对主导性2s→np共振跃迁，基于多组态狄拉克-福克（multiconfiguration Dirac–Fock）方法开展了系统性计算，并给出了共振能量、共振强度与总自然宽度。本文还讨论了类氖等电子序列中光电离截面与共振强度的共振结构及特性，重点探讨了相对论效应的影响。针对氩8+离子，本文所得结果与现有理论计算及实验数据吻合良好。

搜集汇总

背景与挑战

背景概述

该数据集提供了Ne类离子（Ar8+、Fe16+、Kr26+和Xe44+）中3P1和1P1态的2s_n_p阈值能量和量子缺陷δ的表格数据，源自基于Dirac原子R矩阵方法的光致电离截面计算研究。这些数据用于分析2s→np共振跃迁的详细结构，并探讨相对论效应对共振特性的影响，支持原子物理领域的理论计算和实验对比。