Title: Coulomb excitation of 29,30Na: Mapping the borders of the island of inversion
Authors: Seidlitz, M. ×
Reiter, P.
Altenkirch, R.
Bastin, B.
Bauer, C.
Blazhev, A.
Bree, Nick
Bruyneel, B.
Butler, P. A.
Cederkall, J.
Davinson, T.
De Witte, Hilde
DiJulio, D. D.
Diriken, J.
Gaffney, Liam
Geibel, K.
Georgiev, G.
Gernhauser, R.
Huyse, Mark
Kesteloot, Nele
Kroll, T.
Krucken, R.
Lutter, R.
Pakarinen, J.
Radeck, F.
Scheck, M.
Schneiders, D.
Siebeck, B.
Sotty, Christophe
Steinbach, T.
Taprogge, J.
Van Duppen, Piet
Van de Walle, J.
Voulot, D.
Warr, N.
Wenander, F.
Wimmer, K.
Woods, P. J.
Wrzosek-Lipska, Kasia #
Issue Date: 19-Feb-2014
Publisher: Published for the American Physical Society by the American Institute of Physics
Series Title: Physical Review C, Nuclear Physics vol:89 pages:1-10
Article number: 024309
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 29,30Na beams with a final beam energy of 2.85 MeV/nucleon, were performed at REX-ISOLDE, CERN. De-excitation γ rays were detected by the MINIBALL γ -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.
ISSN: 0556-2813
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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