FT-ICR質量分析装置によるレーザー蒸発炭素クラスターの研究

概要

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For experimental treatments of atomic clusters, a FT-ICR (Fourier Transform Ion Cyclotron Resonance) spectrometer with a direct injection supersonic cluster beam source was implemented. Newly designed ICR cell in 6 Tesla superconducting magnet was proved to give a high mass-resolution for positive and negative cluster ions. With this mass-spectrometer, pure carbon and metal-carbon binary clusters generated by the laser-vaporization supersonic expansion cluster-beam source were studied. A special cluster beam source condition was found where only C^_<60> was observed for pure carbon clusters. Furthermore, positive lanthanum-carbon, yttrium-carbon and scandium-carbon binary clusters showed only MC^+_<2n> signal in the range of 36≤2n≤76 with strong magic numbers at MC^+_<44>, MC^+_<50> and MC^+_<60>. Characteristics of these small clusters were compared with results of molecular dynamics simulations.
一般社団法人日本機械学会の論文
1999-11-25