Theory and Calculation of Resonances and Autoionization of Two-Electron Atoms and Ions
In this chapter, we shall review and discuss the theory and calculation of autoionization states of two-electron systems from the point of view of projection operator formalism as used by the authors over many years. Autoionization states are resonances caused by scattering an electron impinging on a target ion or atom. They can also be produced by photoabsorption as well as heavy-particle collisions. It is only comparatively recently that such resonances have been studied in great detail as a result of important experimental and theoretical developments together with the advent of high-speed computers.
KeywordsOptical Potential Resonance Parameter Schrodinger Equation FESHBACH Resonance Total Wave Function
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