Title
Exploring the Low-Z Shore of the Island of Inversion at N=19
Document Type
Article
Publication Date
1-19-2012
Publication Source
Physical Review Letters
Volume Number
108
Issue Number
3
Publisher
American Physical Society
ISSN
0031-9007
Abstract
The technique of invariant mass spectroscopy has been used to measure, for the first time, the ground state energy of neutron-unbound (28)F, determined to be a resonance in the (27)F + n continuum at 220(50) keV. States in (28)F were populated by the reactions of a 62 MeV/u (29)Ne beam impinging on a 288 mg/cm(2) beryllium target. The measured (28)F ground state energy is in good agreement with USDA/USDB shell model predictions, indicating that pf shell intruder configurations play only a small role in the ground state structure of (28)F and establishing a low-Z boundary of the island of inversion for N = 19 isotones.
Keywords
Neutron-rich nuclei, Particle stability, Sweeper magnet, Exotic nuclei, Shell closure, Beta-decay, Fragmentation, Spectroscopy, Isotopes, N=20
Recommended Citation
Christian, G., N. Frank, S. Ash, T. Baumann, D. Bazin, J. Brown, Paul A. DeYoung, J. E. Finck, A. Gade, G. F. Grinyer, A. Grovom, J. D. Hinnefeld, Eric M. Lunderberg, B. Luther, M. Mosby, S. Mosby, Tim Nagi, Graham F. Peaslee, W. F. Rogers, J. K. Smith, J. Snyder, A. Spyrou, M. J. Strongman, M. Thoenessen, M. Warren, D. Weisshaar and A. Wersal. "Exploring the Low-Z Shore of the Island of Inversion at N=19." Physical Review Letters 108, no. 3.00 (2012).
