Interpretation of Some of the Excited States of4nSelf-Conjugate Nuclei

R-matrix analysis of theβdecays ofN12Hyldegaard1, Alcorta2, Bastin3 et al. 2010Phys. Rev. C627410View full textAdd to dashboardCite

“…1) dominates this rate at temperatures relevant for helium burning in red giant stars, but 0 + and 2 + states at higher energy could play a role in the process in high-temperature environments [7]. The position of the 2 + states above the Hoyle state is also a subject of major importance for the understanding of the cluster structure of 12 C. Morinaga boldly suggested a linear chain structure of the Hoyle state [8] and later suggested the 10.3-MeV state to be a rotational excitation of the Hoyle state, therefore requiring a 2 + assignment [9]. In modern microscopic cluster calculations * sgp@phys.au.dk the connection between the 0 + and the 2 + states is suggested to be more complicated, with a stronger connection between the broad 0 + component above the Hoyle state and the first 2 + resonance [10].…”

“…[17], where the full 12 C energy region populated in the 12 N/ 12 B decays is split into energy bins, and for each bin the breakup into 3α particles is analyzed. This breakup can proceed either via the 0 + ground state in 8 Be or through higher energies in 8 Be (including direct breakup). The breakup through higher 8 Be energies is interesting for the purpose of separating 0 + and 2 + contributions because the sequences 12 C(2 + ) → 8 Be(2 + ) and 12 C(0 + ) → 8 Be(2 + ) involve different angular correlations.…”

Structure and Decay Pattern of Linear-Chain States in Neutron-Rich Carbon Isotopes

“…The excited states of light nuclei manifest strong α clustering and have been studied for a long time. The linearchain (LC) structure of 3α particles, in which α particles are aligned on a straight line, is an exotic and famous cluster structure [3]. The LC structure has attracted considerable attention because the valence neutrons may stabilize it by their glue-like role [4][5][6][7][8][9][10].…”

Linear Chain of Alpha Clusters in 16C

“…In particular, the linear-chain configuration of three α particles suggested by Morinaga [1] has long been an important and interesting subject because of its exotic structure and mechanism of formation. However, its existence is nowadays in doubt because of the instability shown by fully microscopic nuclear models [2,3] and the lack of the experimental signature.…”