Abstract
The dissociation of carbon dioxide in an intense (1013–1014W/cm2) femtosecond laser field has been investigated. The stepwise nature of the dissociation has been verified experimentally by analyzing the time-of-flight mass spectroscopic patterns at different laser intensities. The experimental identification shows that if the laser intensity is gradually increased, CO2+ is first formed, followed by a dissociation of one of the CO bonds. Further increase of the laser intensity leads to the dissociation of the second CO bond. Only O+ fragment ion shows anisotropic angular distribution.
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