Size Distribution and Dissociation Patterns of Iron-Sulfur Binary Cluster Ions from Sputter Ion Source
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概要
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The size distribution of iron-sulfur binary cluster ions, FenSm+ (n=1-36, m=1-23), was investigated using secondary ion mass spectrometry (SIMS). The dissociation patterns, n=2-26, m=1-17, were also investigated by varying the acceleration voltage of secondary ions step by step. Iron-sulfur binary cluster ions were produced by 10 keV Xe ion bombardment on a pyrite (FeS2) sheet and were mass-analyzed by a sector type mass spectrometer. Judging from the size distribution observed in mass spectra, the composition ratio n/m of the cluster ions gradually tended to increase as the cluster size became larger. The dissociation patterns of small size tended to yield the FenSn+ (n=2, 4, 6) and FenSn-1+ (n=7, 8, 9) which might be more stable structure. As the cluster size became larger, the dissociation mainly occurred by emitting Fe or S2. Dissociation patterns of FenSm+ suddenly changed at FenSM+ which had maximum peak intensity in the series of FenSm+ for the fixed n. In case of m≤M, Fe emission occurred and S2 emission for m>M
- 日本質量分析学会の論文
- 2001-06-01
著者
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ICHIHARA Toshio
Department of Experimental Pathology and Tumor Biology, Nagoya City University Graduate School of Me
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Ichihara Toshio
Department Of Pathology Osaka City University Medical School
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Ichihara T
Department Of Physics Graduate School Of Science Osaka University
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Ichihara Toshio
大阪市立大学 病理
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Ito Hiroyuki
Department Of Internal Medicine Division Of Cardiovascular And Respiratory Medicine Akita University
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SATOH Takaya
LEOL LTD.
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SAKAE Hiroki
CREST
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KATAKUSE Itsuo
Department of Physics, Graduate School of Science, Osaka University
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Katakuse I
Osaka Univ. Osaka Jpn
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Katakuse Itsuo
Department Of Physics Graduate School Of Science Osaka University
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Ichihara Toshio
Department Of Physics Graduate School Of Science Osaka University
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NAGATA Takeshi
Department of Radiology, Daiyukai General Hospital
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SATOH Takaya
Department of Physics, Graduate School of Science, Osaka University
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SAKAE Hiroki
Department of Physics, Graduate School of Science, Osaka University
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Ito Hiroyuki
Department Of Cardiology Akita University
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Nagata Takeshi
Dept. Of Electrical Engineering Matsue College Of Technology
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Nagata Takeshi
Department Of Physics Graduate School Of Science Osaka University
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Ito Hiroyuki
Department Of Anesthesiology Tokyo Medical And Dental University Graduate School Of Medical And Dent
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ICHIHARA Toshio
Department of Earth and Space Science, Faculty of Science, Osaka University
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