Floquet theory and complex quasivibrational energy formalism for intense field molecular photodissociation

摘要

A practical and nonperturbative method is presented for studying molecular photodissociation processes in the presence of (weak or intense) electromagnetic fields, using only squarehyphen;integrable (L2) functions. By means of the complex coordinate transformation andL2discretization of the vibrational continua, the complex quasivibrational energies (QVE) of the Floquet Hamiltonian can be determined by standard nonhyphen;Hermitian eigenvalue analysis. The real parts of the QVErsquo;s provide the ac Starkhyphen;shifted vibronic energies, whereas the imaginary parts are related to the photodissociation transition rates. The theory is applied to the direct photodissociation of H+2(1ssgr;gndash;2psgr;u) in both weak and strong fields.