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Journal Articles Physical Review C Year : 2014

Coulomb excitation of Na-29,Na-30: Mapping the borders of the island of inversion

M. Seidlitz
  • Function : Author
P. Reiter
  • Function : Author
R. Altenkirch
  • Function : Author
B. Bastin
C. Bauer
  • Function : Author
A. Blazhev
  • Function : Author
N. Bree
  • Function : Author
B. Bruyneel
  • Function : Author
P. A. Butler
  • Function : Author
J. Cederkall
  • Function : Author
T. Davinson
  • Function : Author
H. de Witte
  • Function : Author
D. D. Dijulio
  • Function : Author
J. Diriken
  • Function : Author
L. P. Gaffney
  • Function : Author
K. Geibel
  • Function : Author
G. Georgiev
R. Gernhauser
  • Function : Author
M. Huyse
  • Function : Author
N. Kesteloot
  • Function : Author
T. Kroll
  • Function : Author
R. Krucken
  • Function : Author
R. Lutter
  • Function : Author
J. Pakarinen
  • Function : Author
F. Radeck
  • Function : Author
M. Scheck
  • Function : Author
D. Schneiders
  • Function : Author
B. Siebeck
  • Function : Author
T. Steinbach
  • Function : Author
J. Taprogge
  • Function : Author
P. van Duppen
  • Function : Author
J. V. de Walle
  • Function : Author
D. Voulot
  • Function : Author
N. Warr
  • Function : Author
F. Wenander
  • Function : Author
K. Wimmer
P. J. Woods
  • Function : Author
K. Wrzosek-Lipska
  • Function : Author

Abstract

Nuclear shell evolution in neutron-rich Na nuclei around N = 20 was studied by determining reduced transition probabilities, i.e., B(E2) and B(M1) values, in order to map the border of the island of inversion. To this end Coulomb-excitation experiments, employing radioactive Na-29,Na-30 beams with a final beam energy of 2.85 MeV/nucleon, were performed at REX-ISOLDE, CERN. De-excitation gamma rays were detected by the MINIBALL gamma-ray spectrometer in coincidence with scattered particles in a segmented Si detector. Transition probabilities to excited states were deduced. The measured B(E2) values agree well with shell-model predictions, supporting the idea that in the Na isotopic chain the ground-state wave function contains significant intruder admixture already at N = 18, with N = 19 having an almost pure two-particle-two-hole deformed ground-state configuration.

Dates and versions

in2p3-00985758 , version 1 (30-04-2014)

Identifiers

Cite

M. Seidlitz, P. Reiter, R. Altenkirch, B. Bastin, C. Bauer, et al.. Coulomb excitation of Na-29,Na-30: Mapping the borders of the island of inversion. Physical Review C, 2014, 89, pp.024309. ⟨10.1103/PhysRevC.89.024309⟩. ⟨in2p3-00985758⟩
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