Attosecond Pump-Probe Measurement of an Auger Decay

We characterize the Auger decay of core-shell excitations in Krypton atoms in an all-photonic fashion, using a novel attosecond EUV pump - attosecond optical probe scheme. An intuitive model, where the optical field acts as a temporal amplitude and phase gate on the EUV excited dipole, is used to retrieve the Auger core-hole decay time.