Observation of positive-parity bands in 109Pd and 111Pd: Enhanced γ softness - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review C Year : 2012

Observation of positive-parity bands in 109Pd and 111Pd: Enhanced γ softness

E. A. Stefanova
  • Function : Author
S. Lalkovski
  • Function : Author
A. Korichi
  • Function : Author
T. Kutsarova
  • Function : Author
A. Lopez-Martens
F. R. Xu
  • Function : Author
H. L. Liu
  • Function : Author
S. Kisyov
  • Function : Author
A. Minkova
  • Function : Author
D. Bazzacco
  • Function : Author
M. Bergström
  • Function : Author
A. Görgen
  • Function : Author
F. Hannachi
  • Function : Author
B. Herskind
  • Function : Author
H. Hübel
  • Function : Author
A. Jansen
T. L. Khoo
  • Function : Author
Zs. Podolyák
  • Function : Author
G. Schönwasser
  • Function : Author

Abstract

The neutron-rich nuclei 109Pd and 111Pd were produced as fission fragments following the 30Si+168Er reaction at 142 MeV. Using the identification based on the coincidences with the complementary fission fragments, the only positive-parity bands observed so far in 109Pd and 111Pd emerged from this work. A band, built on top of the 5/2+ ground state exhibiting ΔI=1 energy-level staggering, was observed in each of these nuclei. Both nuclei of interest, 109Pd and 111Pd, are suggested to lie in the transitional region of Pd isotopes of maximum γ softness. The ground states of both nuclei are predicted by total Routhian surface calculations to be extremely γ soft with shallow triaxial minima. The first crossing in the new bands is proposed to be attributable to an alignment of h11/22 neutrons.

Dates and versions

in2p3-00749894 , version 1 (08-11-2012)

Identifiers

Cite

E. A. Stefanova, S. Lalkovski, A. Korichi, T. Kutsarova, A. Lopez-Martens, et al.. Observation of positive-parity bands in 109Pd and 111Pd: Enhanced γ softness. Physical Review C, 2012, 86, pp.044302. ⟨10.1103/PhysRevC.86.044302⟩. ⟨in2p3-00749894⟩
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