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O$$_{2}$$分子衝突で誘起されるRu(0001)表面の吸着O原子の拡散

Diffusion of O atoms at Ru(0001) surface induced by collision of O$$_{2}$$ with high kinetic energy

高橋 真*; 有賀 哲也*; 寺岡 有殿

Takahashi, Shin*; Aruga, Tetsuya*; Teraoka, Yuden

Oxygen translational energy effects on initial oxidation processes and saturation coverage of O at a Ru(0001) surface were investigated using supersonic O$$_{2}$$ molecular beams and synchrotron radiation photoemission spectroscopic techniques. The change of surface core level spectrum of Ru 3d$$_{5/2}$$ by irradiation of O$$_{2}$$ beams with high translational energy indicates occurrence of collision-induced oxygen migration at the oxidized Ru(0001) surface. We suggest that such collision-induced migration provides suitable sites for dissociative adsorption of O$$_{2}$$, resulting in higher O coverage at the Ru(0001) surface.

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