We present results of calculations
of the life-time and shifts of the hydrogenoid atomic levels in
the vacuum between two metallic parallel surfaces. It is considered
an approximation in which the electron interacts with the nucleus
of infinite mass and with two metallic media. In the vacuum, the
interaction is calculated by the method of the electrostatic images.
In the region near to the surfaces and inside the metal there are
used the apprximations given by Borisov for the surface Cu (111)
[1]. The system is described with a non Hermitian Hamiltonian that
is obtained by using the complex dilatation transformation method
[2]. Finally, the resultant Schr\"odinger equation is solved
by means of the finite elements method [5]. The presence of the
second metallic medium gives place to an important disminishing
of the times of life in comparison to the case of a unique surface
reported in [1], [6]. |
[1]. A. G. Borisov, A. K. Kazansky, J. P. Gauyacq.
Phys. Rev. B. 59, 10935 (1999).
[2]. R. Yanj and P. Winkler. J.Phys. B: Atom. Molec Phys. 11,
1475
[5]. J. Mahecha and J. D. Serna. Phys. Chem. Chem. Phys. 2,
4061 (2000).
[6]. P. Nordlander and J. C. Tally. Phys. Rev. B. 42,
5564 (1990).
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