Large-scale calculations of nuclear-structure data for simulation data bases

P. Möller
Theoretical Division, Los Alamos National Laboratory, New Mexico 87545, USA

R. Bengtsson
Department of Mathematical Physics, Lund Institute of Technology, SE-22100 Lund, Sweden

K.-L. Kratz
Max-Planck Institut für Chemie, Otto-Hahn Institut, D55128 Mainz, Germany

H. Sagawa
Center for Mathematical Sciences, University of Aizu, Aizu-Wakamatsu, Fukushima 965-8580, Japan

This paper was presented at the ND2007, International Conference on Nuclear Data for Science and Technology, Nice, France, April 22 -27, 2007. It will appear in the proceedings. It has been assigned Los Alamos National Laboratory Preprint No LA-UR-07-2819,


In the macroscopic-microscopic model we have (1) enhanced our FRDM (1992) model of nuclear ground-state masses and shapes, (2) performed a global calculation of nuclear shape isomers, in which we characterize the ground-state and isomer minima in terms of their relative energies and shapes, and furthermore provide the saddle heights between all pairs of minima, and (3) performed a calculation of fission potential-energy surfaces for more than 5 million different shapes for each of 5254 nuclei from A=170 to A=330. We use an immersion technique borrowed from geography to determine saddle points and minima in these surfaces. We also use this technique to establish if structures such as deep valleys separated by high ridges are present. These would then give rise to different modes of fission.
Figures 4, 5, and 6, are in color, so the paper should be printed on a color printer.

The complete manuscript in color is available for download.

Peter Moller
Last modified: Sept 24 2007