Multiple Coulomb excitation of198Hg and200Hg |
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Authors: | C. Günther H. Hübel A. Kleinrahm R. Kulessa H. Emling P. Fuchs E. Grosse D. Schwalm H. J. Wollersheim J. Idzko H. Ower |
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Affiliation: | 1. Institut für Strahlen- und Kernphysik der Universit?t, Bonn, Federal Republic of Germany 2. Gesellschaft für Schwerionenforschung, Darmstadt, Federal Republic of Germany 4. Institut für Kernphysik, Frankfurt/Main, Federal Republic of Germany
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Abstract: | Multiple Coulomb excitation measurements on198, 200Hg have been performed with 5MeV/amu208Pb projectiles andB(E2)-values are determined for transitions between states up to spin 8+. In198Hg a reduction of theB(E2)-value for the yrast transition 8+→6+ by a factor of 3 as compared to the rigid rotor prediction is observed, which supports the earlier proposed idea that the ground state band is crossed between the 6+ and 8+ state by a weakly interactingvi 13 2/2 rotation aligned band. In each of the two nuclei,198Hg and200Hg, a state with a possibleI π=8+ assignment is observed, which is tentatively interpreted as the 8+ member of the ground state band. |
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