Specific fragmentation of [(CH3)2CO]Arn heteroclusters induced by the Ar L23- and O K-shell excitation |
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| Authors: | Y Tamenori K Okada K Tabayashi T Gejo K Honma |
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| Institution: | aJapan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan;bDepartment of Chemistry, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan;cInstitute for Molecular Science, Okazaki, Aichi 444-8585, Japan;dDepartment of Material Science, University of Hyogo, 3-2-1 Kohto, Kamigori, Hyogo 678-1297, Japan |
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| Abstract: | Ionic fragmentation following the inner-shell photoexcitation of (CH3)2CO]Arn heteroclusters was investigated in the Ar L23- and O K-edge regions. A partial ion yield (PIY) measurement revealed that  and various acetone fragments ( ,  ,  ,  , and CHmCO+) were produced following the Ar L23-shell excitation. In the O K-edge region, the PIY of O+ exhibited a sharp resonance peak at the O 1s → π*(C O) resonance excitation. The selective O+ formation was interpreted as the suppression of statistical fragmentation, which was dominant in isolated acetone, owing to the dissipation of excess energy into Ar clusters. |
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