Theory of multi-photon ionization and autoionization of SI

We present a theory and calculations of 3-photon ionization and autoionization of the silicon atom. We have employed a configuration interaction Hartree-Fock-Dirac method (CIHFD) in order to calculate energies and wavefunctions. The continuum wavefunctions have been obtained numerically and matched to Coulomb functions in the asymptotic region. Our results include energies of bound and autoionizing levels, dipole transition matrix elements, ionization and autoionization transition rates, obtained on the basis of perturbation theory.