发表机构
Institute for Laser Science, The University of Electro-Communications; National Astronomical Observatory of Japan; National Institute for Fusion Science（电波研究所激光科学研究所; 日本国立天文台; 国立研究开发法人核融合科学研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究测量了电子碰撞激发N⁴⁺中特定真空紫外跃迁的偏振度，将实验结果与FAC理论计算值对比，发现理论值系统性偏大，指出需对等电子序列开展进一步研究以解决差异。
AI 中文摘要
我们报道了类锂N⁴⁺中2s--2p₃/₂跃迁的线偏振度，该离子由电子碰撞激发，测量的电子能量范围为85至1000 eV。将测量得到的偏振度与使用柔性原子代码（FAC）计算的理论值进行比较。尽管偏振度随电子能量增加而降低的总体趋势与理论结果吻合，但理论值的绝对值系统性地大于实验值。在检查了可能的实验退偏振来源后，我们认为这种差异可能源于理论模型的高估。还需要对等电子序列进行进一步的理论和实验研究以解决该差异。
英文摘要
We present the linear polarization of the $2s$--$2p_{3/2}$ transition in Li-like N$^{4+}$ excited by electron collisions, measured at electron energies between 85 and 1000~eV. The measured polarizations are compared with theoretical values calculated using the Flexible Atomic Code (FAC). Although the overall trend that the degree of polarization decreases with increasing electron energy is reproduced, the theoretical values are systematically larger in magnitude than the experimental values. After examining possible experimental sources of depolarization, we suggest that the discrepancy likely originates from an overestimation in the theoretical model. Further theoretical and experimental investigations along the isoelectronic sequence are needed to resolve this discrepancy.
