Abstract
The dynamic process of fragmentation of excited states is investigated using a pump-probe approach. EUV radiation (32–48 eV) generated by high-order harmonics was used to ionize and excite CO molecules and a time-delayed infrared (IR) pulse (800 nm) was used to influence the evolution of the dissociating multichannel wave packet. Two groups of states, separable experimentally by their kinetic-energy release (KER), are populated by the EUV and lead to - fragmentation: direct double ionization of the neutral molecule and fragmentation of the cation leading to -, followed by autoionization of . The IR pulse was found to modify the KER of the latter group in a delay-dependent way which is explained with a model calculation.
- Received 15 May 2010
DOI:https://doi.org/10.1103/PhysRevA.82.043410
©2010 American Physical Society