corner
corner
APS » Journals » Phys. Rev. C » Volume 76 » Issue 2
< Previous Article | Next Article >

Phys. Rev. C 76, 021301(R) (2007) [5 pages]

Competition between normal and intruder states inside the “island of inversion”

Download: PDF (216 kB) Buy this article Export: BibTeX or EndNote (RIS)

Vandana Tripathi1, S. L. Tabor1, P. F. Mantica2,3, Y. Utsuno4, P. Bender1, J. Cook2, C. R. Hoffman1, Sangjin Lee1, T. Otsuka5,6, J. Pereira2, M. Perry1, K. Pepper1, J. S. Pinter3, J. Stoker3, A. Volya1, and D. Weisshaar2
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
4Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
5Department of Physics and Center for Nuclear Study, University of Tokyo, Hongo, Tokyo 113-0033, Japan
6RIKEN, Hirosawa, Wako-shi, Saitama 351-0198, Japan

See Also: Erratum

Received 7 March 2007; published 6 August 2007

The β- decay of the exotic 30Ne (N=20) is reported. For the first time, the low-energy level structure of the N=19, 30Na (TZ=4), is obtained from β-delayed γ spectroscopy using fragment-β-γ-γ coincidences. The level structure clearly displays “inversion,” i.e., intruder states with mainly 2p2h configurations displacing the normal states to higher excitation energies. The good agreement in excitation energies and the weak and electromagnetic decay patterns with Monte Carlo shell model calculations with the SDPF-M interaction in the sdpf valence space confirms the small d3/2-f7/2 shell gap. The relative position of the normal dominant and intruder dominant excited states provides valuable information to understand better the N=20 shell gap.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.76.021301
DOI:
10.1103/PhysRevC.76.021301
PACS:
23.20.Lv, 21.60.Cs, 23.40.-s, 27.30.+t

See Also

Erratum: Vandana Tripathi, S. L. Tabor, P. F. Mantica, Y. Utsuno, P. Bender, J. Cook, C. R. Hoffman, Sangjin Lee, T. Otsuka, J. Pereira, M. Perry, K. Pepper, J. S. Pinter, J. Stoker, A. Volya, and D. Weisshaar, Erratum: Competition between normal and intruder states inside the “island of inversion” [Phys. Rev. C 76, 021301 (2007)], Phys. Rev. C 76, 049902 (2007).

 
< Previous Article | Next Article >