Global nuclear structure aspects of tensor interaction
  A direct fit of the isoscalar spin-orbit and both isoscalar and isovector tensor coupling constants to the f5/2-f7/2 SO splittings in 40Ca, 56Ni, and 48Ca requires: (i) a significant reduction of the standard isoscalar spin-orbit strength and (ii) strong attractive tensor coupling constants. The aim of this paper is to address the consequences of these strong attractive tensor and weak spin-orbit fields on total binding energies, two-neutron separation energies and nuclear deformability. 
W. Satula, M. Zalewski, J. Dobaczewski, P. Olbratowski, M. Rafalski,   T.R. Werner, and R.A. Wyss