SHELL-MODEL THEORY OF INELASTIC SCATTERING ON Be$sup 9$

A study is made of the energy levels of Be/sup 9/ with particular emphasis on comparing the inelastic-scattering data with the shell-model predictions. The differential cross sections for inelastic scattering of alpha particles are calculated in distorted-wave Born approximation using a central spin-independent potential to represent the interaction between the incident alpha and each target nucleon. The target wave functions are taken to be intermediate-coupling shell-model wave function. The agreement between theory and experiment is excellent for values of the intermediate coupling parameter, a/ K, which best reproduce the level spectra. The results favor a value a/K = 2.86 over the other popular value, a/K = 1.4. It is suggested that the 1.7- and 11.3- Mev levels do not arise from the (1p)/sup 5/ configuration. (auth)