Large Deformation Data in DFT Fits

1
Large Deformation Data in DFT Fits
N. Nikolov, N. Schunck, W. Nazarewicz, M. Bender
Proposal Include data on well-deformed nuclei
like position of bandheads of super-deformed
bands or fission isomers in the fit of the
functional

• Leptodermous expansion LDM Energy from
  microscopic effective interactions
• Observation some parameters of the expansion
  (assym) are very poorly constrained

Isospin and mass dependence imply larger
uncertainties in neutron-rich nuclei
Force SkM SkP SkI3 SkI4 SLy4
assym -52 MeV -45 MeV -75 MeV -34 MeV -54 MeV
2
N. Nikolov, N. Schunck, W. Nazarewicz, M. Bender

• Leptodermous expansion show stability of deformed
  neutron-rich nuclei caused by (poorly
  constrained) surface-symmetry energy
• Benchmarking of excitation energy of
  super-deformed states and fission isomers with
  microscopic interactions show fluctuations larger
  than theoretical and experimental uncertainties

1 P.-G. Reinhard et al, Phys. Rev. C73, 014309
(2006) 2 M. Bender et al, In preparation