J.M. Schippers, J.M. Schreuder, S.Y. Van Der Werf, K. Allaart, N. Blasi, M. Waroquier Nuclear Physics A 510 (1), 70-921990A1Published while none of the authors were employed at the CMMDOI http://dx.doi.org/10.1016/0375-9474(90)90288-W