Electromagnetic moments of odd-A 193-203,211Po isotopes

M.D. Seliverstov, T.E. Cocolios, W. Dexters, A.N. Andreyev, S. Antalic, A.E. Barzakh, B. Bastin, J. Büscher, I.G. Darby, D.V. Fedorov, V.N. Fedosseev, K.T. Flanagan, S. Franchoo, G. Huber, M. Huyse, M. Keupers, U. Köster, Y. Kudryavtsev, B.A. Marsh, P.L. MolkanovR.D. Page, A.M. Sjödin, I. Stefan, P. Van Duppen, M. Venhart, S.G. Zemlyanoy

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Hyperfine splitting parameters have been measured for the neutron-deficient odd-mass polonium isotopes and isomers Po193-203g,m, Po209,211. The measurement was performed at the ISOLDE (CERN) online mass separator using the in-source resonance ionization spectroscopy technique. The magnetic dipole moments Î and spectroscopic electric quadrupole moments QS have been deduced. Their implication for the understanding of nuclear structure in the vicinity of the closed proton shell at Z=82 and the neutron mid-shell at N=104 is discussed. For the most neutron-deficient nuclei (A=193,195,197), a deviation of Î and QS from the nearly constant values for heavier polonium nuclei was observed. Particle-plus-rotor calculations with static oblate deformation describe the electromagnetic moments for these nuclei well, provided a gradual increase of a mean deformation when going to lighter masses is assumed for the polonium nuclei with A
Original languageEnglish
Pages (from-to)0324323
Number of pages10
JournalPhysical Review C
Issue number3
Publication statusPublished - 31 Mar 2014

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