An improved nuclear mass formula: WS3

Abstract

We introduce a global nuclear mass formula which is based on the macroscopic-microscopic method, the Skyrme energy-density functional and the isospin symmetry in nuclear physics. The rms deviation with respect to 2149 known nuclear masses falls to 336 keV, and the rms deviations from 1988 neutron separation energies and α-decay energies of 46 super-heavy nuclei are significantly reduced to 286 and 248 keV, respectively. The predictive power of the mass formula for describing new measured masses in GSI and those in AME2011 is excellent. In addition, we introduce an efficient and powerful systematic method, radial basis function approach, for further improving the accuracy and predictive power of global nuclear mass models.

9 pages, 6 figures, a talk given by Ning Wang at the 11th International Conference on Nucleus-Nucleus Collisions (NN2012), San Antonio, Texas, USA, May 27-June 1, 2012. To appear in the NN2012 Proceedings in Journal of Physics: Conference Series (JPCS)

References in corpus (6)

• Symmetry Energy I: Semi-Infinite Matter
• Further improvements on a global nuclear mass model
• Mirror nuclei constraint in mass formula
• Dynamical r-process studies within the neutrino-driven wind scenario and its sensitivity to the nuclear physics input
• Nuclear symmetry energy at subnormal densities from measured nuclear masses
• Mass and isospin dependence of symmetry energy coefficients of finite nuclei