title: g factor of hydrogenlike ²⁸Si¹³⁺.
abstract: We determined the experimental value of the g factor of the electron bound in hydrogenlike ²⁸Si¹³⁺ by using a single ion confined in a cylindrical Penning trap. From the ratio of the ion's cyclotron frequency and the induced spin flip frequency, we obtain g = 1.995 348 958 7(5)(3)(8). It is in excellent agreement with the state-of-the-art theoretical value of 1.995 348 958 0(17), which includes QED contributions up to the two-loop level of the order of (Zα)² and (Zα)⁴ and represents a stringent test of bound-state quantum electrodynamics calculations.
authors.affiliation: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Sturm
authors.forename: A
authors.initials: A
authors.lastname: Wagner
authors.forename: B
authors.initials: B
authors.lastname: Schabinger
authors.forename: J
authors.initials: J
authors.lastname: Zatorski
authors.forename: Z
authors.initials: Z
authors.lastname: Harman
authors.forename: W
authors.initials: W
authors.lastname: Quint
authors.forename: G
authors.initials: G
authors.lastname: Werth
authors.forename: C H
authors.initials: CH
authors.lastname: Keitel
authors.forename: K
authors.initials: K
authors.lastname: Blaum