Coulomb excitation of Na-29,Na-30: Mapping the borders of the island of inversion
Seidlitz, M., Reiter, P., Altenkirch, R., Bastin, B., Bauer, C., Blazhev, A., Bree, N., Bruyneel, B., Butler, P. A., Cederkäll, J., Davinson, T., De Witte, H., DiJulio, D.D., Diriken, J., Gaffney, L. P., Geibel, K., Georgiev, G., Gernhäuser, R., Huyse, M., . . . Wrzosek-Lipska, K. (2014). Coulomb excitation of Na-29,Na-30: Mapping the borders of the island of inversion. Physical Review C, 89(2), Article 024309. https://doi.org/10.1103/PhysRevC.89.024309
Published inPhysical Review C
Bree, N. |
Warr, N. |
©2014 American Physical Society. This is an article whose final and definitive form has been published by American Physical Society.
Abstract: Nuclear shell evolution in neutron-rich Na nuclei around N = 20 was studied by determining reduced transition probabilities, i.e., B ( E 2) and B ( M 1) values, in order to map the border of the island of inversion. To this end Coulomb-excitation experiments, employing radioactive 29 , 30 Na 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 ( E 2) 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.
PublisherAmerican Physical Society
ISSN Search the Publication Forum0556-2813
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Except where otherwise noted, this item's license is described as ©2014 American Physical Society. This is an article whose final and definitive form has been published by American Physical Society.
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