Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2008-07-28
Physics
Nuclear Physics
Nuclear Theory
9 pages, LaTeX. To appear in the Proceedings of the XVII International School on Nuclear Physics, Neutron Physics, and Applica
Scientific paper
Shape/phase transitions in atomic nuclei have first been discovered in the framework of the Interacting Boson Approximation (IBA) model. Critical point symmetries appropriate for nuclei at the transition points have been introduced as special solutions of the Bohr Hamiltonian, stirring the introduction of additional new solutions describing wide ranges of nuclei. The complementarity of the IBA and geometrical approaches will be demonstrated by three examples. First, it will be shown that specific special solutions of the Bohr Hamiltonian correspond to the borders of the critical region of the IBA. Second, it will be demonstrated that the distinct patterns exhibited in different transitional regions by the experimental energy staggering in gamma-bands can be reproduced both by the IBA and by special solutions of the Bohr Hamiltonian. Third, a first attempt to obtain a IBA SU(3) level scheme from a special solution of the Bohr Hamiltonian will be presented.
Bonatsos Dennis
McCutchan E. A.
Zamfir Nicolae Victor
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