A parametrization is proposed for hexadecapole tensors, which observes symmetries coming from the $O_h$ group of transformations of the frame of reference defined through the quadrupole deformation and/or the rotation axes. A possible dependence of the hexadecapole deformation parameters on the quadrupole deformation is discussed. The inclusion of octupole deformation is considered.

• Received 30 October 1996

DOI:https://doi.org/10.1103/PhysRevC.56.165