Analysis of Al25 energy levels observed in the Si28(p,α)Al25 reaction
The level structure of Al25 has been studied at the ORNL Holifield Radioactive Ion Beam Facility by measuring the angular and energy distributions of α particles from the Si28(p,α)Al25 reaction. Proton beams (10 nA) at laboratory energies of 40 and 42 MeV were generated by the 25 MV tandem accelerator and bombarded a natural silicon target (50 μg/cm2). Seventeen levels were observed and spins for several were constrained through a distorted-wave Born approximation analysis of the angular distributions. © 2009 The American Physical Society.