Journal
PHYSICAL REVIEW LETTERS
Volume 106, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.143002
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Funding
- Marie Curie programs ATTOCO (IEF)
- ATTOFEL (ITN)
- European Research Council (ALMA)
- Joint Research Programme ALADIN of Laserlab-Europe II
- Swedish Foundation for Strategic Research
- Swedish Research Council
- Knut and Alice Wallenberg Foundation
- French ANR ATTO-WAVE
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We study photoionization of argon atoms excited by attosecond pulses using an interferometric measurement technique. We measure the difference in time delays between electrons emitted from the 3s(2) and from the 3p(6) shell, at different excitation energies ranging from 32 to 42 eV. The determination of photoemission time delays requires taking into account the measurement process, involving the interaction with a probing infrared field. This contribution can be estimated using a universal formula and is found to account for a substantial fraction of the measured delay.
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