https://doi.org/10.1051/epjconf/20146602008
Investigation of 0+ states in mercury isotopes after two-neutron transfer
1 Wright Nuclear Structure Laboratory, Yale University, New Haven, CT-06520, USA
2 Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
3 National Institute for Physics and Nuclear Engineering, Bucharest, R-76900, Romania
4 Fakultät für Physik, Ludwig-Maximilians-Universität München, D-85748 Garching, Germany
5 Faculty of Physics, University of Sofia, 1164 Sofia, Bulgaria
6 Physik Department, Technische Universität München, D-85748 Garching, Germany
a e-mail: christian.bernards@yale.edu
b Present address: Physik Department, Technische Universität München, D-85748 Garching, Germany
Published online: 20 March 2014
Using the high-resolution Q3D magnetic spectrograph at the Maier-Leibnitz Laboratory (MLL) Tandem accelerator in Munich, we studied 0+ excitations in the mercury isotopes 198Hg, 200Hg, and 202Hg after two-neutron transfer. We only observed 4-6 excited 0+ states per nucleus up to about 3-MeV excitation energy, far fewer than in other experiments of this (p, t) campaign. The results reveal a sharp drop in the number of low-lying 0+ states towards the 208Pb shell closure. We discuss the low-energy 0+ state density as a function of the valence nucleon number Nval. The 0+ excitation energies and the measured (p, t) transfer cross sections indicate a structural change throughout the Hg isotopes, with the most notable result being the peaking in the cross section of the low-lying excited 02+ state in 200Hg.
© Owned by the authors, published by EDP Sciences, 2014
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