Abstract
The coincidence imaging technique is applied to direct determination of the momentum vectors of all the fragment ions produced through every event of the Coulomb explosion of a single molecular ion, CS 2 z+ (z=2–4) formed in intense laser fields (∼60 fs, 0.36×10 15 W/ cm 2 ). The molecular structure of CS 2 3+ just before the Coulomb explosion, CS 2 3+→S ++C ++S +, is reconstructed from the measured momentum vectors of the fragment ions. The mean C–S bond length of 〈r〉=2.5 A ̊ and the azimuthally averaged S–C–S bond angle, 〈 γ〉=145°, thus determined indicate that structural deformation occurs to a large extent in the intense laser fields.
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