First observation ofα-cluster states in the14O + 4Heinteraction

Changbo Fu, V. Z. Goldberg, G. V. Rogachev, G. Tabacaru, G. G. Chubarian, B. Skorodumov, M. McCleskey, Y. Zhai, T. Al-Abdullah, L. Trache, R. E. Tribble
2008 Physical Review C  
We measured 14 O + 4 He excitation functions for elastic scattering which demonstrate, for the first time, a well developed α-cluster structure in the proton rich nucleus, 18 Ne. We present the excitation energies and estimates of the spins for the dominant resonances using an R-matrix approach. A resonance at 9.2 MeV excitation energy in 18 Ne is particularly interesting. The spin-parity of the state is found to be 3 − and the α particle reduced width for the state appears to be comparable to
more » ... o be comparable to the single particle limit. We have found indications for unusually large size of the observed α-cluster configuration.
doi:10.1103/physrevc.77.064314 fatcat:zqqc57drwjabnfk4m4zmrmwgr4