Extreme alpha-clustering in the 18O nucleus
Abstract
The structure of the 18O nucleus at excitation energies above the alpha decay threshold was studied using 14C+alpha resonance elastic scattering. A number of states with large alpha reduced widths have been observed, indicating that the alpha-cluster degree of freedom plays an important role in this N not equal Z nucleus. However, the alpha-cluster structure of this nucleus is very different from the relatively simple pattern of strong alpha-cluster quasi-rotational bands in the neighboring 16O and 20Ne nuclei. A 0+ state with an alpha 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.
Cite
@article{arxiv.0906.3556,
title = {Extreme alpha-clustering in the 18O nucleus},
author = {E. D. Johnson and G. V. Rogachev and V. Z. Goldberg and S. Brown and D. Robson and A. M. Crisp and P. D. Cottle and C. Fu and J. Giles and B. W. Green and K. W. Kemper and K. Lee and B. T. Roeder and R. E. Tribble},
journal= {arXiv preprint arXiv:0906.3556},
year = {2009}
}
Comments
4 pages, 2 figures, 1 table. Resubmission with minor changes for clarity, including removal of one figure