研究目的
Investigating core-excited states of nitrosyl chloride (ClNO) and their break-up dynamics following Auger decay
研究成果
The study provides clear evidence for site-specific fragmentation of ClNO upon core-valence excitation followed by Auger decay, with significant correlations between the core-excited site and the location of the bonds that are broken. The fragmentation patterns are influenced by the character of the excited molecular orbital and the localization of the core excitation.
研究不足
The study is limited by the detection efficiency for a single ion, estimated to be ≈33%, and the complexity of distinguishing between different dissociation channels due to the superposition of several channels in coincidence islands.
1：Experimental Design and Method Selection:
The study involved resonant core-electron excitation of ClNO to the LUMO and LUMO+1 orbitals at the N and O K-edges, followed by detection of fragment ions in coincidence with a position sensitive ion time-of-flight detector.
2：Sample Selection and Data Sources:
ClNO gas was used, produced by an effusive molecular beam source.
3：List of Experimental Equipment and Materials:
A position sensitive time-of-flight (TOF) imaging detector was used for detecting charged fragments.
4：Experimental Procedures and Operational Workflow:
The X-ray beam crossed the ClNO gas stream, and the created charged fragments were detected in coincidence. The ion TOF clock was triggered by the signal generated from the electrons emitted in the ionization region.
5：Data Analysis Methods:
The data were analyzed to deduce the angular distribution of the ions, facilitating a comparison between the two resonances and the two K-edges.
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