https://doi.org/10.1140/epja/i2009-10887-1
Letter
Extreme
-clustering in the 18O nucleus
1
Department of Physics, Florida State University, 32306, Tallahassee, FL, USA
2
Cyclotron Institute, Texas A&M University, 77843, College Station, TX, USA
3
The University of Surrey, Guildford, Surrey, UK
* e-mail: edj04@fsu.edu
Received:
19
June
2009
Revised:
24
August
2009
Accepted:
18
September
2009
Published online:
22
October
2009
The structure of the 18O nucleus at excitation energies above the decay threshold was studied using 14C +
resonance elastic scattering. A number of states with large
reduced widths have been observed, indicating that the
-cluster degree of freedom plays an important role in this N
Z nucleus. A 0+ state with an
reduced width exceeding the single-particle limit was identified at an excitation energy of 9.9±0.3 MeV. We discuss evidence that states of this kind are common in light nuclei and give possible explanations of this feature.
PACS: 21.10.Gv Nucleon distributions and halo features – / 24.30.-v Resonance reactions – / 25.55.Ci Elastic and inelastic scattering –
© SIF, Springer-Verlag Berlin Heidelberg, 2009