Shell-model calculation of the spectral function for l=0 proton states in12C

The spectral function for the removal of l=0 protons in¹²C is calculated within the framework of the shell model. The techniques used in the calculation exploit, in a novel fashion, certain features of the Lanczos method used in obtaining energies and wave-functions. G ross and fine details of the resulting strength distributions are compared against the results from¹²C(e, e′p)¹¹B experiments.