1. Non-axial hexadecapole deformations of heaviest nuclei M. Kowal, A. Sobiczewski Soltan Institute for Nuclear Studies, Warsaw, Poland Method of the calculations Deformation space Results Conclusions XIII Nuclear Physics Workshop Kazimierz Dolny, 27. 09 - 1.10. 2006

2. Method of the calculations The calculations are done within a macroscopic- microscopic approach Yukawa-plus-exponential model is used for the macroscopic part Strutinski shell correction taken for its microscopic part The shell correction is based on the Woods- Saxon single-particle potential with the "universal" variant of its parameters

3. Deformation space Nuclear radius Bohr quadrupole deformation Hexadecapole deformation

4. 6-dimensional grid

7. Effect of total hexadecapole deformation

8. Effect of non-axiality parameter

9. Effect of parameter

10. Conclusions Non-axial deformation  2 is important to describe correctly static barriers heights for SHE. Non-axial deformation  4 doesn’t play important role for SHE.  6 non-axiality deformation will be considered in the future.