Lawrence Berkeley National Laboratory
High-spectral-resolution attosecond absorption spectroscopy of autoionization in xenon
- Author(s): Bernhardt, Birgitta
- Beck, Annelise R
- Li, Xuan
- Warrick, Erika R
- Bell, M Justine
- Haxton, Daniel J
- McCurdy, C William
- Neumark, Daniel M
- Leone, Stephen R
- et al.
Published Web Locationhttps://doi.org/10.1103/physreva.89.023408
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. © 2014 American Physical Society.