Köln 2004 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 37: Nuclear Structure/Spectroscopy VI
HK 37.3: Vortrag
Donnerstag, 11. März 2004, 14:30–14:45, A
Study of the 183−190Pb by simultaneous atomic- and nuclear- spectroscopy — •Maxim Seliverstov1, Gerhard Huber1, Peter Kunz1, Andrey Andreyev2, Hilde de Witte2, Piet van Duppen2, Serge Franchoo1, Valentine Fedosseev3, Brigitte Roussiere4, Jocelyne Sauvage4, and Karen van de Vel2 — 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
We have extended the laser spectroscopy on Pb to very neutron deficient isotopes at the mid-shell (N = 104). Now the Pb isotopic chain (more than 30 isotopes and isomers) is the longest investigated chain. The behaviour of the Z=82 magicity is of particular interest for nuclear physics.
The first accurate laser spectroscopic measurements with the laser ion source (RILIS) have been performed at on-line mass-separator ISOLDE. The nuclides were produced by spallation in an uranium-graphite target connected to the RILIS. With a special laser control system (Uni Mainz) long laser scans could be performed. This was essential for the detection of the photoions by their radioactive decay at a β-γ (IPN, Orsay) and α-γ spectroscopy set-ups (Uni Leuven). The combination of atomic and nuclear spectroscopy allowed to identify the resonances from ground- and isomeric- states.
The new results for Pb isotopes will be compared to the corresponding data for the lighter Hg and Pt isotones.