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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.
Abstract

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.

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