State-selective cross sections of multiple photoionization in Ne
State-selective cross sections of multiple photoionization in Ne
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DOI：
10.1103/physreva.76.012717
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发表时间：
2007-07
影响因子：
2.9
通讯作者：
T. Kaneyasu;Y. Hikosaka;E. Shigemasa;F. Penent;P. Lablanquie;T. Aoto;K. Ito
中科院分区：
文献类型：
--
作者：
T. Kaneyasu;Y. Hikosaka;E. Shigemasa;F. Penent;P. Lablanquie;T. Aoto;K. Ito
氖原子的价态双光电离已通过多电子能谱进行了研究。有关喷射电子之间能量相关性的完整信息可以识别 Ne{sup 2+} 最终态及其形成机制。除了从价电子层同时发射两个电子之外，还观察到由单电荷激发态介导的间接过程。通过评估间接过程的贡献，我们首先在宽光子能量区域中状态选择性地获得了直接双光电离截面。我们还将符合光谱应用于价电子层的三电子发射。即使在三电子发射中，符合分析也能够观察与三光电离过程相关的各个Ne{sup 3+}最终状态并获得状态选择性截面。
Valence double photoionization of Ne atom has been investigated by multielectron spectroscopy. Complete information on energy correlation between ejected electrons allows the identification of Ne{sup 2+} final states and their formation mechanism. In addition to simultaneous two-electron emission from the valence shells, indirect processes mediated by singly charged excited states have been observed. We have first obtained direct double-photoionization cross sections state-selectively in a wide photon energy region, by evaluating the contributions of the indirect processes. We have also applied the coincidence spectroscopy to three-electron emission from the valence shells. Even in the three-electron emission, the coincidence analysis enables to observe individual Ne{sup 3+} final states related to the triple-photoionization process and to obtain the state-selective cross sections.