Nuclear charge radii of neutron-deficient lead isotopes beyond N=104 midshell investigated by in-source laser spectroscopy

H. De Witte*, A. N. Andreyev, N. Barre, M. Bender, T. E. Cocolios, S. Dean, D. Fedorov, V. N. Fedoseyev, L. M. Fraile, S. Franchoo, V. Hellemans, P. H. Heenen, K. Heyde, G. Huber, M. Huyse, H. Jeppessen, U. Koster, P. Kunz, S. R. Lesher, B. A. MarshI. Mukha, B. Roussiere, J. Sauvage, M. Seliverstov, I. Stefanescu, E. Tengborn, K. Van de Vel, J. Van de Walle, P. Van Duppen, Yu. Volkov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The shape of exotic even-mass Pb182-190 isotopes was probed by measurement of optical isotope shifts providing mean square charge radii (delta <r(2)>). The experiment was carried out at the ISOLDE (CERN) on-line mass separator, using in-source laser spectroscopy. Small deviations from the spherical droplet model are observed, but when compared to model calculations, those are explained by high sensitivity of delta <r(2)> to beyond mean-field correlations and small admixtures of intruder configurations in the ground state. The data support the predominantly spherical shape of the ground state of the proton-magic Z=82 lead isotopes near neutron midshell (N=104).

Original languageEnglish
Article numberARTN 112502
Number of pages4
JournalPhysical Review Letters
Volume98
Issue number11
DOIs
Publication statusPublished - 16 Mar 2007

Keywords

  • INTRUDER STATES
  • SHIFT
  • UPDATE
  • ALPHA-DECAY
  • ATOMIC SPECTROSCOPY
  • PB-186
  • MOMENTS
  • PB
  • ISOLDE RILIS

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