Abstract
Publisher Summary This chapter discusses role of autoionizing states (AIS) in multiphoton ionization of complex atoms. The behavior of atoms in a time-dependent external field is described by the time-dependent Schrodinger equation. The importance of AIS is based on the fact that they are “drowned” in the continuum spectrum and the interference of two channels—of direct ionization and through AIS—can lead to a rich structure in the cross section. The chapter discusses application of the method to calculation of the two-photon Ionization of calcium. The method of a model Hamiltonian is used in calculations. The results obtained in a configurational-interaction method are similar to theoretical results obtained by using the method of a model Hamiltonian. The obtained calculations show that cross section values in the region of autoionizing resonances are one to three orders higher than cross sections without AIS.
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