title: Split-pulse spectrometer for absolute XUV frequency measurements.
abstract: A split-pulse spectrometer based on pairs of time-delayed femtosecond pulses can give access to accurate frequency measurements in the extreme ultraviolet (XUV) spectral domain. We demonstrate this approach by measuring the absolute frequency of a single-XUV-photon transition to a bound state of atomic argon excited with the ninth harmonic of an amplified Ti:sapphire laser.
authors.affiliation: European Laboratory for non linear Spectroscopy (LENS), 50019 Sesto Fiorentino, Florence, Italy. liontos@lens.unifi.it
authors.forename: I
authors.initials: I
authors.lastname: Liontos
authors.forename: C
authors.initials: C
authors.lastname: Corsi
authors.forename: S
authors.initials: S
authors.lastname: Cavalieri
authors.forename: M
authors.initials: M
authors.lastname: Bellini
authors.forename: R
authors.initials: R
authors.lastname: Eramo