DYNAMICS OF A MOLECULAR-HYDROGEN ION IN INFRARED-LASER FIELDS

The method of numerical simulation is employed to investigate the diss ociation dynamics of elementary molecular systems (H-2(+) and D-2(+) i ons) in an intense infrared laser field. The approximation of n terms is developed for the description of the dynamics of a molecular system in a strong electromagnetic field. The results of calculations carrie d out within the framework of the approximation of n terms are compare d with the results of the exact numerical solution of the relevant two -body problem. The dependence of the dissociation probability on radia tion intensity and frequency is discussed. A quasi-static model is pro posed for the dissociation of molecules in an infrared field. This mod el employs the basis of field-dressed states. It is demonstrated that the quasi-static model provides a physical explanation for the depende nce of the dissociation probability on the intensity and frequency of laser radiation.