Alpha-particle clustering in excited expanding self-conjugate nuclei
  The fragmentation of quasi-projectiles from the nuclear reaction 40Ca + 12C at 25 MeV/nucleon was used to produce alpha-emission sources. From a careful selection of these sources provided by a complete detection and from comparisons with models of sequential and simultaneous decays, strong indications in favour of $\alpha$-particle clustering in excited 16O, 20Ne and 24}Mg are reported. 
B. Borderie, Ad. R. Raduta, G. Ademard, M. F. Rivet, E. De Filippo, E.   Geraci, N. Le Neindre, G. Cardella, G. Lanzalone, I...
nucl-ex