Abstract
Knowledge on nuclear cluster physics has increased considerably as nuclear clustering remains one of the most fruitful domains of nuclear physics, facing some of the greatest challenges and opportunities in the years ahead. The occurrence of "exotic" shapes in light N = Z α-like nuclei and the evolution of clustering from stability to the drip-lines are being investigated more and more accurately both theoretically and experimentally. Experimental progresses in understanding these questions were recently examined and will be further revisited in this introductory talk: clustering aspects are, in particular, discussed for light exotic nuclei with a large neutron excess such as neutron-rich Oxygen isotopes with their complete spectrocopy.
Highlights
One of the greatest challenges in nuclear science is understanding the structure of light nuclei from both experimental and theoretical perspectives
In light α-like nuclei clustering is observed as a general phenomenon at high excitation energy close to the α-decay thresholds [5, 8]
This exotic behavior has been perfectly illustrated by the famous ”Ikeda-Diagram” for N =Z nuclei in 1968 [9], which has been modified and extended by von Oertzen [10] for neutron-rich nuclei more than 10 years ago, as shown in the left panel of figure 2
Summary
One of the greatest challenges in nuclear science is understanding the structure of light nuclei from both experimental and theoretical perspectives. Starting in the 1960s the search for resonant structures in the excitation functions for various combinations of light α-cluster (N =Z) nuclei in the energy regime from the Coulomb barrier up to regions with excitation energies of Ex=20−50 MeV remains a subject of contemporary debate [3, 4]. These resonances [4] have been interpreted in terms of nuclear molecules [3].
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