title: Charge Radii of Neutron Deficient ^{52,53}Fe Produced by Projectile Fragmentation.
abstract: Bunched-beam collinear laser spectroscopy is performed on neutron deficient ^{52,53}Fe prepared through in-flight separation followed by a gas stopping. This novel scheme is a major step to reach nuclides far from the stability line in laser spectroscopy. Differential mean-square charge radii δ⟨r^{2}⟩ of ^{52,53}Fe are determined relative to stable ^{56}Fe as δ⟨r^{2}⟩^{56,52}=-0.034(13)  fm^{2} and δ⟨r^{2}⟩^{56,53}=-0.218(13)  fm^{2}, respectively, from the isotope shift of atomic hyperfine structures. The multiconfiguration Dirac-Fock method is used to calculate atomic factors to deduce δ⟨r^{2}⟩. The values of δ⟨r^{2}⟩ exhibit a minimum at the N=28 neutron shell closure. The nuclear density functional theory with Fayans and Skyrme energy density functionals is used to interpret the data. The trend of δ⟨r^{2}⟩ along the Fe isotopic chain results from an interplay between single-particle shell structure, pairing, and polarization effects and provides important data for understanding the intricate trend in the δ⟨r^{2}⟩ of closed-shell Ca isotopes.
authors.affiliation: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.|Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
authors.forename: K
authors.initials: K
authors.lastname: Minamisono
authors.affiliation: Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
authors.forename: D M
authors.initials: DM
authors.lastname: Rossi
authors.affiliation: Helmholtz-Institut Jena, Jena 07743, Germany.|Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Beerwerth
authors.affiliation: Helmholtz-Institut Jena, Jena 07743, Germany.|Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Fritzsche
authors.affiliation: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
authors.forename: D
authors.initials: D
authors.lastname: Garand
authors.affiliation: Department of Chemistry, Augustana University, Sioux Falls, South Dakota 57197, USA.
authors.forename: A
authors.initials: A
authors.lastname: Klose
authors.affiliation: Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Maaß
authors.affiliation: Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.|Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA.
authors.forename: P F
authors.initials: PF
authors.lastname: Mantica
authors.affiliation: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.|Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
authors.forename: A J
authors.initials: AJ
authors.lastname: Miller
authors.affiliation: Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: P
authors.initials: P
authors.lastname: Müller
authors.affiliation: Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.|Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.|Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, 02-093 Warsaw, Poland.
authors.forename: W
authors.initials: W
authors.lastname: Nazarewicz
authors.affiliation: Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Nörtershäuser
authors.affiliation: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
authors.forename: E
authors.initials: E
authors.lastname: Olsen
authors.affiliation: TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.
authors.forename: M R
authors.initials: MR
authors.lastname: Pearson
authors.affiliation: Institut für Theoretische Physik, Universität Erlangen, D-91054 Erlangen, Germany.
authors.forename: P-G
authors.initials: PG
authors.lastname: Reinhard
authors.affiliation: National Research Centre "Kurchatov Institute," 123182 Moscow, Russia.|National Research Nuclear University MEPhI, 115409 Moscow, Russia.
authors.forename: E E
authors.initials: EE
authors.lastname: Saperstein
authors.affiliation: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
authors.forename: C
authors.initials: C
authors.lastname: Sumithrarachchi
authors.affiliation: National Research Centre "Kurchatov Institute," 123182 Moscow, Russia.|Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia.
authors.forename: S V
authors.initials: SV
authors.lastname: Tolokonnikov