二次イオン生成過程 : 電子トンネリングモデルと結合破壊モデル

概要

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Secondary ion emission phenomena are reviewed by the electron tunneling and the bond breaking model, which are mainly based on the results of Yus group. The electron tunneling model can apply to the non-localized materials such as metals. The alkali metals are typical examples which can be applied this electron tunneling model. The bond breaking model can be applied to ionic and covalent bond materials. Oxidized materials are typical examples. Here, the outline of the electron tunneling and the bond breaking model will be explained and some typical experimental results will be shown. Although the experimental results of the alkali on Si(100) which were obtained by the authors group can be explained by the above mentioned electron tunneling model, however, this simple model cannot apply to the alkali on Si(111) system. This might be due to the localized potential effect which was already studied in the filed of low energy ion scattering.
日本質量分析学会の論文
2001-02-01