Calculation of Nuclear Masses and Fission Barriers in the Macroscopic-Microscopic Model

Peter Moller

Wednesday, 9 May 2012, 11:00
Seminar room F

The macroscopic-microscopic method is seen by some as primitive in comparison with self-consistent Hartree-Fock or Relativistic Mean-Field models. However, in the last several decades it has provided the most reliable way of calculating many nuclear properties globally for nuclides across the nuclear chart and for modeling basic properties of unknown nuclei such as superheavy nuclei or very neutron-rich nuclei. I will briefly describe the main features of the model and then show how our last mass table, FRDM (1992), compares to a variety of nuclear-structure data, and also discuss how HFB models compare these data. I will then give a preview of our first mass-table revision in 20 years, FRDM(2012), and the improvements relative to FRDM(1992). I will pay particular attention to the results for superheavy nuclei. The macroscopic-microscopic method is also successfully applied to nuclear fission, where HFB models have significant problems, inherent to the use constraints in such calculations. I will also discuss some new results from our fission work.