Vibration, rotation, and dissociation of molecular ions in a strong laser field

Vibration, rotation, and dissociation of the simple diatomic molecular Cl₂⁺ and H₂⁺ ions perturbed by a strong laser pulse with linear polarization are considered in the framework of classic mechanics. The duration of the laser pulse influences the rotation of the molecular axis and the vibration of the internuclear separation. The molecular axis of the heavy molecular ion Cl₂⁺ is strongly rotated at the end of an ultrashort laser pulse, whereas the alignment of the H₂⁺-ion axis occurs during the rise of a long laser pulse owing to quick dissociation. Angular distributions of protons in dissociation of the H₂⁺ ion are calculated.