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Phys. Rev. C 66, 024325 (2002) [5 pages]

Transition to the “island of inversion”: Fast-beam γ-ray spectroscopy of 28,30Na

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B. V. Pritychenko1,2,*, T. Glasmacher1,2, P. D. Cottle3, R. W. Ibbotson1,†, K. W. Kemper3, K. L. Miller1,2, L. A. Riley4, and H. Scheit1,2,‡
1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
2Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
3Department of Physics, Florida State University, Tallahassee, Florida 32306
4Department of Physics and Astronomy, Earlham College, Richmond, Indiana 47374

Received 6 May 2002; published 29 August 2002

The excitation cross sections to the first collective excitations in 28,30Na have been measured with the technique of intermediate-energy heavy-ion scattering. The trends in the deduced intrinsic electromagnetic quadrupole moments obtained in the present study and in a previous study of 31Na suggest that the ground state of 31Na is dominated by intruder configurations, while the lighter sodium isotopes are not. This conclusion is supported by data on binding energies.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.66.024325
DOI:
10.1103/PhysRevC.66.024325
PACS:
27.30.+t, 25.70.Bc, 25.70.De

*Present address: Plumtree Software, Inc., San Francisco, CA 94111.

†Present address: Brookhaven National Laboratory, Upton, NY 11973.

‡Present address: Max-Planck-Institut für Kernphysik, Postfach 10 39 80, D-69029 Heidelberg, Germany.

 
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