Laser Coulomb-explosion imaging of small molecules

Details Laser Coulomb-explosion imaging of small molecules Laser Coulomb-explosion imaging of small molecules

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phrva..71a3415l&link_type=abstract

Physical Review A, vol. 71, Issue 1, id. 013415

Other

22

Other Multiphoton Processes, Electronic Excitation And Ionization Of Molecules, Intermediate Molecular States, Strong-Field Excitation Of Optical Transitions In Quantum Systems, Multiphoton Processes, Dynamic Stark Shift

Scientific paper

We use intense few-cycle laser pulses to ionize molecules to the point of Coulomb explosion. We use Coulomb’s law or ab initio potentials to reconstruct the molecular structure of D2 O and S O2 from the correlated momenta of exploded fragments. For D2 O , a light and fast system, we observed about 0.3 Å and 15° deviation from the known bond length and bond angle. By simulating the Coulomb explosion for equilibrium geometry, we showed that this deviation is mainly caused by ion motion during ionization. Measuring three-dimensional structure with half bond length resolution is sufficient to observe large-scale rearrangements of small molecules such as isomerization processes.

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