Negative photoion spectroscopy of SF6 in the inner valence and S 2p energy regions
Negative photoion spectroscopy of SF6 in the inner valence and S 2p energy regions
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SF6 内价态和 S 2p 能区的负光电离子光谱
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
C. Latimer
中科院分区：
文献类型：
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作者：
S. Scully;R. Mackie;R. Browning;K. Dunn;C. Latimer
利用同步辐射研究了SF6负碎片离子的形成，能量范围为20-205 eV。观察到碎片离子F ~-、F ~ 2 ~-、S ~-和SF ~-。结果表明，形状共振和未占价轨道在内价电子和S2 p电子光激发后的负离子形成中起重要作用。光激发后的S 2 p核心电子的负离子产率显示的证据的本地化的形状共振轨道周围的中心S原子。的F-和F2-在外层价和内层价能区的产量不仅证实，离子对的形成发生通过预解离里德伯态，但也表明，第一次，价内跃迁的重要性。
Negative fragment ion formation from SF6 has been studied using synchrotron radiation within the energy range 20-205 eV. The fragment ions F-, F2-, S- and SF- have been observed. It is shown that shape resonance and unoccupied valence orbitals play an important role in negative ion formation after photoexcitation of inner valence and S 2p electrons. The negative ion yields after photoexcitation of a S 2p core electron show evidence of localization of the shape resonance orbitals around the central S atom. The yields of F- and F2- in the outer valence and inner valence energy regions not only confirm that ion pair formation occurs via predissociating Rydberg states but also demonstrate, for the first time, the importance of intravalence transitions.