J. Ryckebusch, K. Heyde, L. Machenil, D. Ryckbosch, M. Vanderhaeghen, M. Waroquier Physical Review C 46 (3), R829-R8321992A1Published while none of the authors were employed at the CMMDOI http://dx.doi.org/10.1103/PhysRevC.46.R829