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Phys. Rev. C 63, 011305 (2000) [4 pages]

First observation of an excited state in the neutron-rich nucleus 31Na

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B. V. Pritychenko1,2, T. Glasmacher1,2, B. A. Brown1,2, P. D. Cottle3, R. W. Ibbotson1 *, K. W. Kemper3, 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

Rapid Communication Received 12 October 1999; published 19 December 2000

The first excited state in the neutron-rich N=20 isotope 31Na was observed at 350(20) keV via intermediate energy heavy-ion scattering, which is dominated by the Coulomb excitation mechanism. This state appears to be a rotational excitation built on a strongly deformed ground state. The yield of the γ ray deexciting this state can be reproduced by a shell model calculation which takes ν(f7/2,p3/2) intruder configurations into account.


©2000 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.63.011305
DOI: 10.1103/PhysRevC.63.011305
PACS: 25.70.De, 21.60.Cs, 23.20.Js, 27.30.+t

* 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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