The Fe i spectra emitted by astrophysical sources contain information on plasma parameters such as chemical abundances and magnetic fields. However, to determine these parameters requires detailed plasma modeling, which in turn needs accurate atomic data for processes such as radiative decay and electron-impact excitation in Fe i. A lack of fine-structure resolved collision strengths for transitions in Fe i is addressed in this paper with the presentation of data obtained from a Dirac R-matrix calculation. The suitability of our choice of target description is shown, with our energies generally within 7% of literature values. Various A-values are compared with other theoretical and experimental results, and the quality of the collision strengths produced in this work demonstrated. A comparison of 300- and 1000-level close-coupling expansions is made, the latter shown to eliminate pseudoresonances in the collision strengths at electron energies between 0.5 and 1.0 Ry. Maxwell-averaged effective collision strengths are presented, and the convergence of our data is shown in the temperature range 1000–100,000 K.

天体物理源发出的 Fe i光谱包含有关等离子体参数的信息，例如化学丰度和磁场。然而，要确定这些参数需要详细的等离子体建模，而这又需要准确的原子数据，例如 Fe i 中的辐射衰变和电子撞击激发等过程。在本文中，通过介绍从 Dirac R矩阵计算获得的数据，解决了 Fe i 中跃迁的精细结构解析碰撞强度的缺乏。显示了我们选择的目标描述的适用性，我们的能量通常在文献值的 7% 以内。各种A- 值与其他理论和实验结果进行了比较，并证明了这项工作中产生的碰撞强度的质量。进行了 300 级和 1000 级紧密耦合扩展的比较，后者表明在 0.5 和 1.0 Ry 之间的电子能量下消除了碰撞强度中的伪共振。呈现了麦克斯韦平均的有效碰撞强度，我们的数据在 1000-100,000 K 温度范围内收敛。