类N等电子序列的R矩阵电子碰撞激发数据
R-matrix electron-impact excitation data for the N-like iso-electronic sequence
摘要：
类氮离子的谱线可以用来测量各种天体物理等离子体的温度和密度。天体物理等离子体模拟程序的原子数据库在类N离子的电子碰撞激发数据集，特别是$R$矩阵数据方面仍有改进的空间。这对于未来的天文台（例如Arcus）尤其重要，因为它们将拥有高分辨率光谱仪。我们的目标是获得从O II到Zn XXIV的类N离子在宽温度范围内直到$nl=5d$的所有跃迁的能级分辨有效碰撞强度（即，O $^{+}$至Zn $^{23+}$），并评估本工作的准确性。我们还研究了我们的新数据对等离子体诊断的影响，通过模拟太阳观测与CHIANTI。我们已经进行了系统的$R$矩阵计算的N-类离子，其中包括725精细结构的目标水平的配置相互作用的目标和紧密耦合的碰撞展开。碰撞强度的计算采用$R$ -矩阵中间耦合标架变换法，原子结构的计算采用AUTOSTRUCTURE程序。我们比较目前的结果与档案数据库和文献中的选定离子。比较涵盖了能级、振子强度和有效碰撞强度。我们展示了改进的等离子体诊断的例子相比，只使用扭曲波数据以及一些使用以前的$R$矩阵数据的CHIANTI模型。电子碰撞激发数据根据原子数据和分析结构（ADAS）数据类it adf 04存档，并将在OPEN-ADAS中提供。这些数据可用于改进天体物理等离子体诊断的原子数据库。
英文摘要：
Spectral lines from N-like ions can be used to measure the temperature and density of various types of astrophysical plasmas. The atomic databases of astrophysical plasma modelling codes still have room for improvement in their electron-impact excitation data sets for N-like ions, especially $R$-matrix data. This is particularly relevant for future observatories (e.g. Arcus) which will host high-resolution spectrometers. We aim to obtain level-resolved effective collision strengths for all transitions up to $nl=5d$ over a wide range of temperatures for N-like ions from O II to Zn XXIV (i.e., O$^{+}$ to Zn$^{23+}$) and to assess the accuracy of the present work. We also examine the impact of our new data on plasma diagnostics by modelling solar observations with CHIANTI. We have carried-out systematic $R$-matrix calculations for N-like ions which included 725 fine-structure target levels in both the configuration interaction target and close-coupling collision expansions. The $R$-matrix intermediate coupling frame transformation method was used to calculate the collision strengths, while the AUTOSTRUCTURE code was used for the atomic structures. We compare the present results for selected ions with those in archival databases and the literature. The comparison covers energy levels, oscillator strengths, and effective collision strengths. We show examples of improved plasma diagnostics when compared to CHIANTI models which use only distorted wave data as well as some which use previous $R$-matrix data. The electron-impact excitation data are archived according to the Atomic Data and Analysis Structure (ADAS) data class it adf04 and will be available in OPEN-ADAS. The data can be used to improve the atomic databases for astrophysical plasma diagnostics.
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