Isotope-shift measurements of stable and short-lived lithium isotopes for nuclear-charge-radii determination

W. Nörtershäuser, R. Sánchez, G. Ewald, A. Dax, J. Behr, P. Bricault, B. A. Bushaw, J. Dilling, M. Dombsky, G. W. F. Drake, S. Götte, H.-J. Kluge, Th. Kühl, J. Lassen, C. D. P. Levy, K. Pachucki, M. Pearson, M. Puchalski, A. Wojtaszek, Z.-C. Yan, and C. Zimmermann
Phys. Rev. A 83, 012516 – Published 31 January 2011

Abstract

Changes in the mean square nuclear charge radii along the lithium isotopic chain were determined using a combination of precise isotope shift measurements and theoretical atomic structure calculations. Nuclear charge radii of light elements are of high interest due to the appearance of the nuclear halo phenomenon in this region of the nuclear chart. During the past years we have developed a laser spectroscopic approach to determine the charge radii of lithium isotopes which combines high sensitivity, speed, and accuracy to measure the extremely small field shift of an 8-ms-lifetime isotope with production rates on the order of only 10 000 atoms/s. The method was applied to all bound isotopes of lithium including the two-neutron halo isotope Li11 at the on-line isotope separators at GSI, Darmstadt, Germany, and at TRIUMF, Vancouver, Canada. We describe the laser spectroscopic method in detail, present updated and improved values from theory and experiment, and discuss the results.

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  • Received 1 September 2010

DOI:https://doi.org/10.1103/PhysRevA.83.012516

© 2011 American Physical Society

Authors & Affiliations

W. Nörtershäuser1,2, R. Sánchez1,2, G. Ewald1, A. Dax1,*, J. Behr3, P. Bricault3, B. A. Bushaw4, J. Dilling3, M. Dombsky3, G. W. F. Drake5, S. Götte1, H.-J. Kluge1, Th. Kühl1, J. Lassen3, C. D. P. Levy3, K. Pachucki6, M. Pearson3, M. Puchalski7, A. Wojtaszek1,†, Z.-C. Yan8, and C. Zimmermann9

  • 1GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
  • 2Institut für Kernchemie, Universität Mainz, D-55099 Mainz, Germany
  • 3TRIUMF, Vancouver, British Columbia, Canada V6T 2A3
  • 4Pacific Northwest National Laboratory, Richland, Washington 99352, USA
  • 5Department of Physics, University of Windsor, Windsor, Ontario, Canada, N9B 3P4
  • 6Faculty of Physics, University of Warsaw, PL-00-681 Warsaw, Poland
  • 7Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, PL-60-780 Poznań, Poland
  • 8Department of Physics, University of New Brunswick, Fredericton, New Brunswick, Canada, E3B 5A3
  • 9Physikalisches Institut, Universität Tübingen, D-72076 Tübingen, Germany

  • *Current address: CERN, CH-1211 Geneva 23, Switzerland.
  • Current address: Instytut Fizyki, Jan Kochanowski University, PL-25-406, Kielce, Poland.

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Vol. 83, Iss. 1 — January 2011

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