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 interactingvi132/2 rotation aligned band. In each of the two nuclei,198Hg and200Hg, a state with a possibleIπ=8+ assignment is observed, which is tentatively interpreted as the 8+ member of the ground state band.
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