The New Finite-Range Droplet-Model Mass Table FRDM(2012)
Peter Moller
Los Alamos National Laboratory
日時：2013年03月18日（月） 15:00-16:15
場所：大学院講義室（総合研究棟7階745号室）
The mass table FRDM(1992) has an error of 0.669 MeV with respect to aninterim 1989 massevaluation with 1654 nuclei. We have now finalized a new mass tableFRDM(2012) whichhas an error of 0.5595 MeV with respect to the 2149 nuclei in theAME2003evaluation, towhich its model constants were adjusted. There are several reasons forthis improvement:1) we optimize better the macroscopic model parameters, 2) we study thepotential energyin a full four-dimensional deformation space. 3) we include the effectofaxial asymmetryon the ground state energy 4) we have improved the calculation ofground-state zero-pointenergies, A brief summary of this work is in Ref. [1]. Locallysubstantialimprovements wereachieved, mainly in regions of shape coexistence. We have compared the1992 and 2012 tablesto the nuclei in the new trap measurements by [2] in such a region ofshape coexistence.For the 1992 table the rms is 1.10 MeV, for the new table 0.38 MeV, forthese nine nuclei.We also present the impact of the new mass table on r-process abundancecalculations.