Abstract
The 10B+10B reactions are measured at beam energies of 50 and 72.2 MeV. The large spin of 10B nucleus (Jύ= 3+) makes this reaction particularly suitable to populate high spin states in the exit channels. Population and decay of different states in A≈10 mass region is studied, and the results are discussed from the structure point of view. In particular, a new state in 12C at Ex= 24.4 MeV is observed to be strongly populated in the triple α-particle coincidences.
Highlights
States of different structures occur in light nuclei around A=10, at similar excitation energies: from shell-model to very exotic ones
Recent work by Marin Lámbarri et al [4] made an important step in completing and systematizing the 12C spectroscopy in general, with a new state (5− at Ex= 22.4 MeV) reported, and most of the lowlying 12C states explained as corresponding to the triangular oblate spinning top with a D3h symmetry [5]
10B ground state can be described as shell model stretched configuration with two nucleons in p3/2 subshell coupled to maximum possible spin, fundamental no-core shell model calculations correctly reproduce its spin only if the three-nucleon force is taken into account [13]
Summary
States of different structures occur in light nuclei around A=10, at similar excitation energies: from shell-model to very exotic ones. 10B ground state can be described as shell model stretched configuration with two nucleons in p3/2 subshell coupled to maximum possible spin, fundamental no-core shell model calculations correctly reproduce its spin only if the three-nucleon force is taken into account [13] Lines correspond to different isotopes of H, He, Li, Be, B and C, from bottom to top, respectively, being the most abundant 4He and heaviest detected 13C
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