title: Quantum state-resolved probing of strong-field-ionized xenon atoms using femtosecond high-order harmonic transient absorption spectroscopy.
abstract: Femtosecond high-order harmonic transient absorption spectroscopy is used to resolve the complete |j,m quantum state distribution of Xe+ produced by optical strong-field ionization of Xe atoms at 800 nm. Probing at the Xe N4/5 edge yields a population distribution rhoj,|m| of rho3/2,1/2ratiorho1/2,1/2ratiorho3/2,3/2=75+/-6 :12+/-3 :13+/-6%. The result is compared to a tunnel ionization calculation with the inclusion of spin-orbit coupling, revealing nonadiabatic ionization behavior. The sub-50-fs time resolution paves the way for tabletop extreme ultraviolet absorption probing of ultrafast dynamics.
authors.affiliation: Department of Chemistry and Physics, University of California, Berkeley, California 94720, USA.
authors.forename: Zhi-Heng
authors.initials: ZH
authors.lastname: Loh
authors.forename: Munira
authors.initials: M
authors.lastname: Khalil
authors.forename: Raoul E
authors.initials: RE
authors.lastname: Correa
authors.forename: Robin
authors.initials: R
authors.lastname: Santra
authors.forename: Christian
authors.initials: C
authors.lastname: Buth
authors.forename: Stephen R
authors.initials: SR
authors.lastname: Leone