论文标题
通过单一和双核孔创建多个原子阴离子的多次光检查
Multiple photodetachment of atomic anions via single and double core-hole creation
论文作者
论文摘要
我们回顾了原子阴离子的$ K $ - 壳分离研究的最新实验和理论进步。在实验方面，该领域在很大程度上受益于第三代同步辐射源的技术进步。对于C $^ - $，O $^ - $和F $^ - $离子的多重分离，在Petra III Synchrotron Light of Hamburg的Photon-Ion Merged Beams设置管中获得了最新的结果，这是Photon-Ion Merged Beams Setup Pipe。与以前可用的光子通量相比，该管道设置对重电反应产品具有非凡的检测敏感性，使人可以研究具有极低跨段范围内极低的横截面的脱离过程，例如，对于涉及单个光子共同创建两个核心孔的过程。实验发现对最新的原子理论提出了新的挑战，并需要将光激发（电离）与衰减的级联进程相结合的计算，这些过程在初始核心孔产生后随后遵循。
We review the recent experimental and theoretical progress in $K$-shell detachment studies of atomic anions. On the experimental side, this field has largely benefitted from technical advances at 3rd generation synchrotron radiation sources. For multiple detachment of C$^-$, O$^-$, and F$^-$ ions, recent results were obtained at the photon-ion merged-beams setup PIPE which is a permanent end station at beamline P04 of the PETRA III synchrotron light source in Hamburg. In addition to a much increased photon flux as compared to what was available previously, the PIPE setup has an extraordinary detection sensitivity for heavy charged reaction products that allows one to study detachment processes with extremely low cross sections in the kilobarn range, e.g., for processes involving the simultaneous creation of two core-holes by a single photon. The experimental findings pose new challenges for state-of-the-art atomic theory and require calculations combining photoexcitation (ionization) with decay cascade processes that follow after initial core-hole production.
