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Early Onset of Ground State Deformation in Neutron Deficient Polonium Isotopes

Abstract : In-source resonant ionization laser spectroscopy of the even-A polonium isotopes 192-210;216;218Po has been performed using the 6p37s 5S2 to 6p37p 5P2 ( ¼ 843:38 nm) transition in the polonium atom (Po-I) at the CERN ISOLDE facility. The comparison of the measured isotope shifts in 200-210Po 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.
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http://hal.in2p3.fr/in2p3-00576005
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Submitted on : Monday, March 14, 2011 - 2:06:16 PM
Last modification on : Friday, November 6, 2020 - 12:22:07 PM

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T. E. Cocolios, W. Dexters, M. D. Seliverstov, A. N. Andreyev, S. Antalic, et al.. Early Onset of Ground State Deformation in Neutron Deficient Polonium Isotopes. Physical Review Letters, American Physical Society, 2011, 106, pp.052503. ⟨10.1103/PhysRevLett.106.052503⟩. ⟨in2p3-00576005⟩

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