Multiphoton detachment rates of H- for weak and strong fields

Many-electron, many-photon theory (MEMPT) was used to study the ab initio calculations of field-perturbed states and the cycle-averaged nonlinear response of atoms and molecules to strong static and dynamic electromagnetic fields for arbitrary N-electron states. The multiphoton electron detachment rates (MPEDR) were obtained as the imaginary part of a complex eigenvalues. The results of the MEMPT spectrum analysis suggested that the nonlinear response of polyelectronic atomic states of arbitrary structures in ac fields could be accurately treated within a nonperturbative framework using the Schrodinger equations.