A Program for Time-Independent Calculations of Multiphoton Processes in One-Electron Atomic Systems

摘要

A computer program distributed through the Computer Physics Communications Library is briefly presented. Its main aim is to obtain quasienergy spectra for one-electron atoms or ions undergoing multiphoton ionization in an intense two-color field or ionization in a strong static electric field. It can also calculate rates of photoionization in specific ATI channels and angular distributions of photoelectrons in the approximation where the atom is represented by a single dressed state. The Floquet equations are solved on a basis of spherical harmonics and complex Sturmian functions. The calculation can be perturbative or nonperturbative.