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Resonance states of hydrogen atom near metal surfaces
Hiroya Suno1), Daiji Kato1), Takako Kato1), and Mineo Kimura2)
1) National Institute for Fusion Science, Toki-shi 509-5292 Gifu, Japan
Resonant charge transfer between metal surfaces and ions is an important process in a number of surface-diagnostic methods such as Auger electron spectroscopy, ion neutralization spectroscopy and secondary-ion-mass spectroscopy. Resonance positions and widths of one-electron ions near metal surfaces have been calculated by Borisov et al. [1], Deutscher et al. [2], and Kurpick and Thumm [3]. In this work, we treat hydrogen atoms near metal surfaces like Al, W, and Mo by using two different computational schemes : The one uses the Siegert pseudostate method [4] and the discrete variable representation, while the other employs the complex absorbing potential method [5] and the basis spline expansion method. The model potential, proposed by Jennings et al. [6], is used to take into account the interaction between the electron and the metal surface. We calculate the energy and lifetime of low-lying atomic states as functions of the distance between the proton and the metal surface, and compare the results obtained by the two techniques.
References
[1] A.G. Borisov et al., Phys. Rev. A, 53, 2457 (1996).
[2] S.A. Deutscher et al., Phys. Rev. A, 55, 466 (1997). [3] P. Kurpick and U. Thumm, Phys. Rev. A, 58 (1998). [4] O.I. Tolstikhin et al., Phys. Rev. A, 58, 2077 (1998). [5] T. Seidemann, J. Chem. Phys., 98, 1989 (1993). [6] P. J. Jennings et al., Phys. Rev. B, 37, 6113 (1988).
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