Cocolios TE, Dexters W, Seliverstov MD, Andreyev AN, Antalic S, Barzakh AE, Bastin B, Büscher J, Darby IG, Fedorov DV, Fedosseyev VN, Flanagan KT, Franchoo S, Fritzsche S, Huber G, Huyse M, Keupers M, Köster U, Kudryavtsev Y, Mané E, Marsh BA, Molkanov PL, Page RD, Sjoedin AM, Stefan I, Van de Walle J, Van Duppen P, Venhart M, Zemlyanoy SG, Bender M, Heenen PH. Early onset of ground state deformation in neutron deficient polonium isotopes.
PHYSICAL REVIEW LETTERS 2011;
106:052503. [PMID:
21405388 DOI:
10.1103/physrevlett.106.052503]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Indexed: 05/30/2023]
Abstract
In-source resonant ionization laser spectroscopy of the even-A polonium isotopes (192-210,216,218)Po has been performed using the 6p(3)7s (5)S(2) to 6p(3)7p (5)P(2) (λ=843.38 nm) transition in the polonium atom (Po-I) at the CERN ISOLDE facility. The comparison of the measured isotope shifts in (200-210)Po 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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