Abstract:In this paper we calculated the model dependence of the field ionization rate of hydrogen atom in a uniform electric field. In order to calculate the probability of barrier penetration we use semiclassical (WKB) approximation, which is calculated for two model potentials. In the model 1 the Coulomb potential is used only near the nucleus. In model 2 the Coulomb potential is used in all regions. These results are compared with the accepted result of 4F −1 exp (−2/3F )
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