Multiphoton Processes in Atoms in intense laser-light fields is gaining ground as a spectroscopic diagnostic tool. The authors present descriptions of processes occurring in atoms under the action of strong electromagnetic radiation, in particular, the shift, broadening, and mixing of atomic states. The topics include tunneling ionization, above-threshold ionization, ionization of multiply charged ions, resonance-enhanced ionization, super-intense radiation fields, and properties of Rydberg states strongly perturbed by laser radiation.

1 Introduction

2 AC-Stark Shift of Atomic Levels
3 Ionization of a Particle with a Short-Range Potential Well
4 Thnneling Ionization of Atoms
5 Direct (Nonresonant) Multiphoton Ionization of Atoms
6 Resonance-Enhanced Ionization
7 Above-Threshold Ionization of Atoms
8 Multiple Ionization of Atoms
9 Atoms in Super-Intense Laser Fields
References.