Four quasiparticle alignments in Ge-66
May, 200313 pages
Published in:
- Phys.Rev.C 67 (2003) 054319
Citations per year
Abstract: (APS)
The neutron-deficient nucleus 66Ge was populated at high spin in two experiments using the reaction 40Ca(32S,α2p) at beam energies of 105 and 95 MeV. In the first experiment, a self-supporting 40Ca target was used, while a gold-backed target of similar thickness was used in the second experiment. γ rays were detected with the EUROBALL array, combined with the charged-particle detector array EUCLIDES and the Neutron Wall. The level scheme of 66Ge was extended up to E≈18MeV and Iπ=(23−). Above angular momentum 10+, we found two sequences, connected by energetically staggered ΔI=1 M1 transitions. The total Routhian surface calculations describe 66Ge at lower spins as a γ-soft nucleus having a moderate deformation of β2≈0.23, while a triaxial deformation is predicted for the band structures above Iπ=10+. To our knowledge, this is the first observation of staggered M1 transitions in a deformed four-quasiparticle π(g9/22)ν(g9/22) structure.- 27.50.+e
- 23.20.Lv
- 25.70.Hi
- 21.10.Re
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