The decay of highly excited states of xenon after absorption of extreme ultraviolet light is directly tracked via attosecond transient absorption spectroscopy using a time-delayed near-infrared perturbing pulse. The lifetimes of the autoionizing 5s5p66p and 5s5p67p channels are determined to be (21.9 ± 1.3) fs and (48.4 ± 5.0) fs, respectively. The observed values support lifetime estimates obtained by traditional linewidth measurements. The experiment additionally obtains the temporal evolution of the decay as a function of energy detuning from the resonance center, and a quantum mechanical formalism is introduced that correctly accounts for the observed energy dependence.
Fields of Expertise
- Advanced Materials Science
Bernhardt, B., Beck, A. R., Li, X., Warrick, E. R., Bell, M. J., Haxton, D. J., ... Leone, S. R. (2014). High-spectral-resolution attosecond absorption spectroscopy of autoionization in xenon. Physical Review / B, 89, 023408-1 - 023408-5. https://doi.org/10.1103/PhysRevA.89.023408