Simple Soluble Molecular Ionization Model

Details Simple Soluble Molecular Ionization Model Simple Soluble Molecular Ionization Model

2004-02-09

arxiv.org/abs/physics/0402051v2

Phys. Rev. A 69, 053409 (2004)

Physics

Atomic Physics

26 pp, 10 figures, latex; Revision: normalization (factor of 1/2) of field-free plots corrected -- figs 4,8,10. Ionization cas

Scientific paper

10.1103/PhysRevA.69.053409

We present a simple exact analytical solution, using the Weyl-Titchmarsh-Kodaira spectral theorem, for the spectral function of the one-dimensional diatomic molecule model consisting of two attractive delta function wells in the presence of a static external electric field. For sufficiently deep and far apart wells, this molecule supports both an even and an odd state, and the introduction of a static electric field turns these bound states into quasi-bound states which are Stark shifted and broadened. The continuum spectrum also inherits an intricate pattern of resonances which reflect the competition between resonant scattering between the two atomic wells and between the linear potential and one or both atomic well(s). All results are analytic and can be easily plotted. The relation between the large orders of the divergent perturbative Stark shift series and the non-perturbative widths of quasi-bound levels is studied.

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