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Autoionization Dynamics of (2P1/2)ns/d States in Krypton Probed by Noncollinear Wave Mixing with Attosecond Extreme Ultraviolet and Few-Cycle Near Infrared Pulses

preprint
submitted on 10.06.2019, 01:32 and posted on 11.06.2019, 17:05 by Ashley Fidler, Hugo Marroux, Erika Warrick, Etienne Bloch, Wei Cao, Stephen Leone, Daniel Neumark
The autoionization dynamics of the (2P1/2)ns/d Rydberg states in krypton are investigated using wave-mixing signals generated with subfemtosecond XUV pulses and noncollinear, few-cycle NIR pulses. Despite quantum beat oscillations from the XUV-induced coherence, these wave-mixing spectra allow for the simultaneous evaluation of autoionization lifetimes from a series of Rydberg states. Experimentally measured lifetimes for the wave-mixing signals emitting from the (2P1/2)6d/8s, 7d/9s, and 8d/10s resonances compare favorably with lifetimes for the (2P1/2)6d, 7d, and 8d Rydberg states determined from spectral linewidths. Analysis of the quantum beats reveals that the enhancement of wave-mixing pathways leads to reporter state-dependent decays in the wave-mixing signals. The results demonstrate the promise of wave-mixing spectroscopies with subfemtosecond XUV pulses to provide valuable insights into processes governed by electronic dynamics.

Funding

DE-AC02-05CH11231

History

Email Address of Submitting Author

apfidler@berkeley.edu

Institution

Lawrence Berkeley National Laboratory

Country

United States

ORCID For Submitting Author

0000-0001-6539-2904

Declaration of Conflict of Interest

No conflicts of interest.

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