建议的 Be II 电子碰撞激发和电离截面

IF 2.7 3区物理与天体物理 Q2 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL

Atomic Data and Nuclear Data Tables Pub Date : 2024-02-01 DOI:10.1016/j.adt.2023.101634

Dipti , I. Bray , D.V. Fursa , H. Umer , C. Hill , Yu. Ralchenko

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引用次数: 0

摘要

概述了 Be II 电子碰撞激发和电离截面的现状，并提出了用于等离子体建模的推荐数据集。利用收敛紧密耦合（CCC）方法计算了 1s2nl（n≤5）构型最低 14 个原子项之间的精确截面，并将其与现有的实验和理论结果进行了比较。推荐的电子碰撞激发和电离截面由分析拟合函数表示，这些函数保留了正确的渐近行为。通过评估目标结构的准确性、后续碰撞计算的收敛性和拟合方法，确定了推荐数据集的不确定性。大多数转变的不确定性都在 15% 以内。提供了 91 个激发截面和 14 个电离截面的拟合系数，供等离子体建模模拟使用。

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Recommended electron-impact excitation and ionization cross sections for Be II

An overview of the current status of electron-impact excitation and ionization cross sections for Be II is given and the recommended data sets for use in plasma modeling are presented. Accurate cross sections between the lowest 14 atomic terms of $1 s^{2} n l (n \leq 5)$ configurations are calculated with the convergent close-coupling (CCC) method and compared with the available experimental and theoretical results. The recommended electron-impact excitation and ionization cross sections are represented by analytical fitting functions that preserve correct asymptotic behavior. Uncertainties in the recommended data sets are determined by assessing the accuracy of the target structures, the convergence in the subsequent collisional calculations, and the fitting method. They are well within 15 % for most of the transitions. The fitting coefficients for 91 excitation cross sections and 14 ionization cross sections are provided for use in plasma modeling simulations.

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来源期刊

Atomic Data and Nuclear Data Tables 物理-物理：核物理

CiteScore

4.50

自引率

11.10%

发文量

审稿时长

47 days

期刊介绍： Atomic Data and Nuclear Data Tables presents compilations of experimental and theoretical information in atomic physics, nuclear physics, and closely related fields. The journal is devoted to the publication of tables and graphs of general usefulness to researchers in both basic and applied areas. Extensive ... click here for full Aims & Scope Atomic Data and Nuclear Data Tables presents compilations of experimental and theoretical information in atomic physics, nuclear physics, and closely related fields. The journal is devoted to the publication of tables and graphs of general usefulness to researchers in both basic and applied areas. Extensive and comprehensive compilations of experimental and theoretical results are featured.