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Phys. Rev. C 72, 064330 (2005) [5 pages]

Spectroscopy of 25Ne and the N=16 magic number

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S. W. Padgett1, Vandana Tripathi1,*, S. L. Tabor1, P. F. Mantica2,3, C. R. Hoffman1, M. Wiedeking1,†, A. D. Davies2,4, S. N. Liddick2,3, W. F. Mueller2, A. Stolz2, and B. E. Tomlin2,3
1Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
2National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
3Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
4Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA

Received 12 October 2005; published 30 December 2005

The low-energy level structure of 25Ne has been investigated following the β- decay of 25F. Beta-delayed γ spectroscopy revealed new γ transitions in 25Ne at 1234, 1622, and 2090 keV. The new transitions were placed in the level scheme of 25Ne in accordance with the observed γ-γ coincidences. The total β- decay strength has been accounted for. The spins and parities of the first two excited states could be ascertained by comparison with a shell model calculation and the literature. The half-life for 25F decay was also remeasured using fragment-β-γ correlations, revealing a value of 90 ± 9 ms. Comparison with shell model calculations are indicative of a wider N=16 gap as compared to the stable nuclei.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.72.064330
DOI:
10.1103/PhysRevC.72.064330
PACS:
23.40.-s, 23.20.Lv, 21.60.Cs, 27.30.+t

*Corresponding author

†Present address: Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.

 
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