Phys. Rev. Lett. 106, 052503 (2011) [4 pages]Early Onset of Ground State Deformation in Neutron Deficient Polonium IsotopesReceived 11 October 2010; published 2 February 2011 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 (λ=843.38 nm) transition in the polonium atom (Po-I) at the CERN ISOLDE facility. The comparison of the measured isotope shifts in 200–210Po 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. © 2011 American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.106.052503
DOI:
10.1103/PhysRevLett.106.052503
PACS:
21.10.Ft, 27.80.+w, 29.38.-c, 31.15.-p
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