TY - JOUR ID - 10442/12757 A1 - A1 - Schultze, M. A1 - A1 - Fiess, M. A1 - A1 - Karpowicz, N. A1 - A1 - Gagnon, J. A1 - A1 - Korbman, M. A1 - A1 - Hofstetter, M. A1 - A1 - Neppl, S. A1 - A1 - Cavalieri, A. L. A1 - A1 - Komninos, Y. A1 - A1 - Mercouris, T. D. A1 - et al. Y1 - 2010/// T1 - Delay in Photoemission JF - Science VL - 328 IS - 5986 SN - 0036-8075 U3 - 10.1126/science.1189401 PB - American Association Advancement Science SP - 1658–1662EP - UR - https://hdl.handle.net/10442/12757 N2 - Photoemission from atoms is assumed to occur instantly in response to incident radiation and provides the basis for setting the zero of time in clocking atomic-scale electron motion. We used attosecond metrology to reveal a delay of 21 +/- 5 attoseconds in the emission of electrons liberated from the 2p orbitals of neon atoms with respect to those released from the 2s orbital by the same 100-electron volt light pulse. Small differences in the timing of photoemission from different quantum states provide a probe for modeling many-electron dynamics. Theoretical models refined with the help of attosecond timing metrology may provide insight into electron correlations and allow the setting of the zero of time in atomic-scale chronoscopy with a precision of a few attoseconds. ER -