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  Curtis, N.; Achouri, N.L.; Ashwood, N.I.; Bohlen, H.G.; Catford, W.N.; Clarke, N.M.; Freer, M.; Haigh, P. J.; Laurent, B.; Orr, N.A.; Patterson, N.P. ; Soic, N. ; Thomas, J.S. ; Ziman, V.: Breakup reaction study of the Brunnian nucleus ¹⁰C. Physical Review C 77 (2008), p. 021301(R)/1-5

10.1103/PhysRevC.77.021301

Abstract:
The structure and 2α + 2p breakup of ¹⁰C, the only known Brunnian nucleus, has been studied at 33.3 MeV/nucleon. The breakup kinematics were used to reconstruct the ¹⁰C \rightarrow ⁹B + p, ⁹B \rightarrow ⁸Be + p, ⁸Be \rightarrow α + α and ¹⁰C \rightarrow ⁶Be + α, ⁶Be \rightarrow ⁵Li + p, ⁵Li \rightarrow α + p decay paths. Proton emission was seen to be favored. The decay of excited states at E_x = 4.20, 5.31, and 6.74 MeV was observed. The previously unobserved state at 4.20 MeV may correspond to a J^π = 0⁺ α + 2p + α cluster structure.