Core-level excitation in argon clusters
作者： E. Rühl , H.W. Jochims , C. Schmale , E. Biller , A.P. Hitchcock
DOI: 10.1016/0009-2614(91)87020-C
关键词: Spectral line 、 Extended X-ray absorption fine structure 、 Photoionization 、 Argon 、 Atomic physics 、 Chemistry 、 XANES 、 Cluster (physics) 、 Ion 、 Quadrupole mass analyzer 、 Physical and Theoretical Chemistry 、 General Physics and Astronomy
摘要: Abstract Argon clusters prepared in a supersonic-jet expansion are photoionized with monochromatized synchrotron radiation the L 3 /L 2 regime (240–280 eV). The cluster cations and their fragments mass selected quadrupole spectrometer. photoionization-efficiency curves of small ions already show similar features which known from X-ray absorption solid argon. These solid-like become more dominant when cluster-size distribution neutral precursors is increased. spectra analysed terms near-edge (NEXAFS) extended fine structure (EXAFS). NEXAFS shows cluster-specific different compared to atom solid. In energy above 260 eV, EXAFS-like structures have been identified. Possible fragmentation mechanisms for core-level-excited argon discussed.
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