Abstract
Using the well established binding energies of one and two valence neutrons in the two-center α+α system (forming the states in 9Be and 10Be*) the structure of these nuclear dimers and their rotational bands including those with more than 2 nucleons are discussed using published transfer reaction data for Be and Boron isotopes. Based on the 0 +2 state in 12C which is supposed to be an 3α particle chain at an excitation energy of 7.65 MeV and using the binding energy of these valence neutrons in 9Be and 10Be*, chain states in the system 12C* + x neutrons are constructed. The energy position of the lowest chain states are estimated and ways for their population in reactions on 9Be and using radioactive beams are proposed. It is expected that these states are metastable and could have appreciable branches for γ-decay. Further extrapolations to longer chain states (polymers) in neutron rich light isotopes are made.
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