Electron Detachment in Slow Collisions between a Negative Ion and an Atom
Time-dependent problems with slowly changing parameters of the system, where two discrete energy levels (terms) come close together with a subsequent transition occuring between the two states, have been extensively investigated in quantum mechanics. For calculations of the transition probability the formulae of Landau-Zener or Landau-Teller or Zener-Rosen or some others (26) can be used, depending on the particular conditions. These theories are not applicable, however, to the case where an isolated energy level approaches the continuum boundary. Then the term interacts with an infinite number of energy levels rather than with only one, and the above theories are no longer applicable.
Unable to display preview. Download preview PDF.