Berlin 2005 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 17: Kernphysik/Spektroskopie
HK 17.5: Vortrag
Montag, 7. März 2005, 15:15–15:30, TU MA004
Pb and Bi isotopes at N=104 mid-shell studied by laser and nuclear decay spectroscopy. — •Maxim Seliverstov1, Gerhard Huber1, Peter Kunz1, Andrey Andreyev2, Hilde de Witte2, Piet van Duppen2, Serge Franchoo2, Valentine Fedosseev3, Brigitte Roussiere4, Jocelyne Sauvage4, and Bruce Marsh3,5 — 1University of Mainz, 55099, Mainz, Germany — 2University of Leuven, 3001 Leuven, Belgium — 3ISOLDE CERN, 1211 Geneve 23, Switzerland — 4Institut de Physique Nucleaire, IN2P3-CNRS, 91406 Orsay, France — 5University of Manchester, Manchester M13 9PL, UK
Mean-square charge radii and magnetic moments have been measured for the neutron deficient Pb and Bi isotopes (near and below the neutron mid-shell N = 104). This region is of particular interest for its prominent nuclear shape isomerism.
The measurements were performed at the on-line mass-separator ISOLDE (CERN) with in-source laser spectroscopy. The combination of the atomic spectroscopy using the resonant ionisation laser ion source (RILIS) with the simultaneous nuclear spectroscopy (α-γ, β-γ ) at the detection set-up provides a very high sensitivity. This is essential in view of very low production yields of the isotopes under study. This combination yields high isomer selectivity and gives an excellent opportunity to study magnetic and shape properties of the low-lying isomeric states.
The (preliminary) results for 183−190Pb and 189−191 Bi isotopes will be presented; the experimental data will be compared with theoretical IBM calculations.