Particle decay of Be12 excited states

Abstract

The breakup of E/A=50 MeV Be12 fragments following inelastic scattering off of hydrogen and carbon target nuclei has been studied. The breakup channels α+He8, He6+He6, t+Li9, and p+Li11 were observed. Two doublets at excitation energies of 12.8 and 15.5 MeV were found for the α+He8 channel. A low-energy shoulder in the excitation-energy spectra at 10.2 MeV indicates one or more additional states. This work could not confirm the presence of He6-He6 rotational structure reported by Freer [Phys. Rev. C 63, 034301 (2001)], although possible peaks at excitation energies of 13.5 and 14.5 MeV were found for He6+He6 decay. Significant structure is observed in the excitation-energy spectrum for p+Li11 at 25-30 MeV which maybe associated with T=3 analog states. © 2007 The American Physical Society.