Resonant Electron Impact Excitation of 3d Levels in Fe14+ and Fe15+
Resonant Electron Impact Excitation of 3d Levels in Fe14+ and Fe15+
复制标题
DOI：
10.3847/1538-4357/aa97e5
复制
发表时间：
2017-10
期刊：
影响因子：
--
通讯作者：
Takashi Tsuda;E. Shimizu;Safdar Ali;H. Sakaue;D. Kato;I. Murakami;H. Hara;Tetsuya Watanabe
中科院分区：
文献类型：
--
作者：
Takashi Tsuda;E. Shimizu;Safdar Ali;H. Sakaue;D. Kato;I. Murakami;H. Hara;Tetsuya Watanabe
本文报道了用单能电子束激发Fe ~（14+）和Fe ~（15+）的3 p-3d跃迁的实验室谱。在通过扫描电子能量获得的能量依赖性光谱中，共振激发被确认为在特定电子能量处的强度增强。实验结果与理论计算的基础上完全相对论波函数和扭曲波近似的截面进行了比较。实验和理论结果之间的比较显示出良好的协议的共振强度。一个显着的差异，但是，发现在Fe 14+的非共振截面。这种差异被认为是以前报道的模型与观察到的和过渡之间的强度比不一致的根本原因。
We present laboratory spectra of the 3p–3d transitions in Fe14+ and Fe15+ excited with a mono-energetic electron beam. In the energy-dependent spectra obtained by sweeping the electron energy, resonant excitation is confirmed as an intensity enhancement at specific electron energies. The experimental results are compared with theoretical cross sections calculated based on fully relativistic wave functions and the distorted wave approximation. Comparisons between the experimental and theoretical results show good agreement for the resonance strength. A significant discrepancy is, however, found for the non-resonant cross section in Fe14+. This discrepancy is considered to be the fundamental cause of the previously reported inconsistency of the model with the observed intensity ratio between the and transitions.