Early Onset of Ground State Deformation in Neutron Deficient Polonium Isotopes

T. E. Cocolios*, W. Dexters, M. D. Seliverstov, A. N. Andreyev, S. Antalic, A. E. Barzakh, B. Bastin, J. Buescher, I. G. Darby, D. V. Fedorov, V. N. Fedosseyev, K. T. Flanagan, S. Franchoo, S. Fritzsche, G. Huber, M. Huyse, M. Keupers, U. Koester, Yu. Kudryavtsev, E. ManeB. A. Marsh, P. L. Molkanov, R. D. Page, A. M. Sjoedin, I. Stefan, J. Van de Walle, P. Van Duppen, M. Venhart, S. G. Zemlyanoy, M. Bender, P. -H. Heenen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In-source resonant ionization laser spectroscopy of the even-A polonium isotopes Po-192-210,Po-216,Po-218 has been performed using the 6p(3)7s S-5(2) to (6)p(3)7p P-5(2) (lambda = 843.38 nm) transition in the polonium atom (Po-I) at the CERN ISOLDE facility. The comparison of the measured isotope shifts in Po200-210 with a previous data set allows us to test for the first time recent large-scale atomic calculations that are essential to extract the changes in the mean-square charge radius of the atomic nucleus. When going to lighter masses, a surprisingly large and early departure from sphericity is observed, which is only partly reproduced by beyond mean field calculations.

Original languageEnglish
Article numberARTN 052503
Pages (from-to)1-4
Number of pages4
JournalPhysical Review Letters
Volume106
Issue number5
DOIs
Publication statusPublished - 2 Feb 2011

Keywords

  • UPDATE
  • COEXISTENCE
  • CHARGE-RADII
  • LASER SPECTROSCOPY
  • SHIFTS
  • MASS NUCLEI
  • DROPLET-MODEL
  • HYPERFINE-STRUCTURE
  • NUCLEAR MOMENTS
  • PO-192

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