Nuclear states of 28Si and 28Al from (α,t) and (α,h) reactions at 80 MeV

Angular distributions for the 27Al(α,t)28Si and 27Al(α,h)28Al one-nucleon transfer reactions have been measured for an incident energy of 80 MeV. Finite-range distorted-wave Born-approximation calculations, using new sd-shell model wave functions, were found to be in reasonable agreement with the data corresponding to exciting positive-parity final states. Transitions to negative-parity 4-, 5-, and 6- T = 0 and 1 states display shapes characteristic of an l = 3 orbital angular momentum transfer, consistent with a dominant (0f/sub 7/2/0d/sub 5/2/-1) model configuration. Extracted strengths are in generally fair agreement with previous results, except for those corresponding to the unbound 5- and 6- T = 1 28Si states which are about 50% more fragmented than previously observed