Abstract
The structure of nuclear dimers and their rotational bands based on the α-α potential and covalent valence neutrons with up to 4 valence nucleons are discussed using published transfer reaction data for Be and boron isotopes. Based on the 0+2 state in12C, which is assumed to be an 3 α-particle chain at an excitation energy of 7.65 MeV and adding the covalent nucleons, chain states in the system12C* +x neutrons are constructed. The energy position of the lowest chain states are estimated and ways for their population in reactions on9Be and using radioactive beams are proposed. It is expected that these states are metastable and could have appreciable branches for γ-decay. Extrapolations to longer chain states, polymers, in neutron-rich light isotopes are made.
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