Masses and Charge Radii of Ne1722 and the Two-Proton-Halo Candidate Ne17

W. Geithner, T. Neff, G. Audi, K. Blaum, P. Delahaye, H. Feldmeier, S. George, C. Guénaut, F. Herfurth, A. Herlert, S. Kappertz, M. Keim, A. Kellerbauer, H.-J. Kluge, M. Kowalska, P. Lievens, D. Lunney, K. Marinova, R. Neugart, L. Schweikhard, S. Wilbert, and C. Yazidjian
Phys. Rev. Lett. 101, 252502 – Published 19 December 2008

Abstract

High-precision mass and charge radius measurements on Ne1722, including the proton-halo candidate Ne17, have been performed with Penning trap mass spectrometry and collinear laser spectroscopy. The Ne17 mass uncertainty is improved by factor 50, and the charge radii of Ne1719 are determined for the first time. The fermionic molecular dynamics model explains the pronounced changes in the ground-state structure. It attributes the large charge radius of Ne17 to an extended proton configuration with an s2 component of about 40%. In Ne18 the smaller radius is due to a significantly smaller s2 component. The radii increase again for Ne1922 due to cluster admixtures.

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  • Received 27 June 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.252502

©2008 American Physical Society

Authors & Affiliations

W. Geithner1, T. Neff2, G. Audi3, K. Blaum1,2,*, P. Delahaye4, H. Feldmeier2, S. George1,2, C. Guénaut3, F. Herfurth2, A. Herlert4,5, S. Kappertz1, M. Keim1, A. Kellerbauer4,*, H.-J. Kluge2,6, M. Kowalska4, P. Lievens7, D. Lunney3, K. Marinova8, R. Neugart1, L. Schweikhard5, S. Wilbert1, and C. Yazidjian2

  • 1Institut für Physik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
  • 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
  • 3CSNSM-IN2P3-CNRS, 91405 Orsay-Campus, France
  • 4Physics Department, CERN, 1211 Geneva 23, Switzerland
  • 5Institut für Physik, Ernst-Moritz-Arndt-Universität, 17487 Greifswald, Germany
  • 6Fakultät für Physik und Astronomie, Ruprecht-Karls-Universität, 69120 Heidelberg, Germany
  • 7Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven, 3001 Leuven, Belgium
  • 8Laboratory of Nuclear Reactions, Joint Institute of Nuclear Research, 141980 Dubna, Russia

  • *Present address: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.

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Vol. 101, Iss. 25 — 19 December 2008

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