Investigation of0+states in198Hg after two-neutron pickup

Abstract

We studied 0 + states in 198 Hg after the 200 Hg(p, t) 198 Hg transfer reaction up to 3-MeV excitation energy. The experiment was performed using the high-resolution Q3D magnetic spectrograph at the Maier-Leibnitz Laboratory (MLL) Tandem accelerator in Munich. In total, only four 0 + states were observed in 198 Hg, significantly fewer than in other experiments of the (p, t) transfer campaign. We discuss the low-energy 0 + state density as a function of the valence nucleon number N val and test if the 0 + density can be used as a signature for the prolate-oblate shape-phase transition in the Hf-Hg region.

Calculation of the Positive Parity Yrast Bands of 190–198Hg Nuclei

“…Nomura et al [12] applied the interacting boson model with configuration mixing and with parameters derived from the self-consistent mean-field calculation employing the microscopic Gogny energy density functional to the systematic analysis of the low-lying structure in Hg isotopes. Bernards et al [13] studied 0 + states in 198 Hg after the 200 Hg( , ) 198 Hg transfer reaction up to the 3-MeV excitation energy, and the experiment was performed, by using a high-resolution Q3D magnetic spectrograph at the Maier-Leibnitz Laboratory Tandem accelerator in Munich. García-Ramos et al [14] described the even-even Hg isotopes, 172−200 Hg, by using the interacting boson model including the configuration mixing and paid a special attention to the description of the shape of nuclei and to its connection with the shape coexistence phenomenon.…”

Untitled

“…In the IBM, the E1 and E2 transitions are calculated by Eqs. (5) and (4) respectively. We have used  …”