Laser-assisted Autoionization

Z. X. Zhao, X. M. Tong, C. D. Lin
(Physics Department, Kansas State University, Manhattan, KS 66506)

A quantum mechanical model is developed to describe laser-assisted autoionization. Numerical simulation is performed for a two-channel model system under XUV and laser pulses. The laser-dressed electron spectra calculated with both methods are in good agreement justifying the validity of the theoretical model. The dynamics of the system is traced in time domain by varying the time delay between two the pulses and lifetime of the resonance is obtained from the time dependence of electron count within sidebands. The model is further applied to the case of two resonances. From the oscillation of the electron counts with the time delay, the energy separation between the two resonances, as well as the lifetime of each resonance, can be deduced.

This work was supported by the Chemical Sciences, Geosciences and Biosciences Division,
Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy.

Submitted to DAMOP, May 2004 in Tucson, AZ.

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