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Título

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

Autor Seidlitz, M.; Reiter, P.; Altenkirch, R.; Bastin, B.; Bauer, C.; Taprogge, J. ; Wenander, F.; Wimmer, K.; Woods, P.J.; Wrzosek-Lipska, K.
Fecha de publicación 2014
EditorAmerican Physical Society
Citación Physical Review C - Nuclear Physics 89: 024309 (2014)
ResumenNuclear 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. © 2014 American Physical Society.
Descripción Seidlitz, M., et all ; 10 pags. ; 9 figs. ; 1 tab. ; PACS number(s): 21.60.Cs, 23.20.Js, 25.70.De, 29.38.Gj
URI http://hdl.handle.net/10261/110225
DOI10.1103/PhysRevC.89.024309
Identificadoresdoi: 10.1103/PhysRevC.89.024309
issn: 0556-2813
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