Structural Deformation of CO22+ in Intense Femtosecond Laser Fields

The angular distributions of CO+ from the dissociation of CO2+2 and CO+2 in intense femtosecond laser fields (45 fs, about 5 × 1015 W/cm2) are studied at a laser wavelength of 800 nm based on the time-of-flight mass spectra of CO fragment ions. The experimental results show that structural deformation occurs in the charge state of CO2+2 and the CO+2 maintains linear geometrical structure.