International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07757

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

P. Möller¹, R. Bengtsson², K.L. Kratz³ and H. Sagawa<sup>4

1</sup>  Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
²  Department of Mathematical Physics, Lund Institute of Technology, 22100 Lund, Sweden
³  Max-Planck Institut für Chemie, Otto-Hahn Institut, 55128 Mainz, Germany
⁴  Center for Mathematical Sciences, University of Aizu, Aizu-Wakamatsu, Fukushima 965-8580, Japan

moller@lanl.gov

Published online: 21 May 2008

Abstract
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.

© CEA 2008