Structure of Fission Potential-Energy Surfaces
in
Complete, Multi-Million-Grid-Point
Five-Dimensional Deformation Spaces
Peter MÖLLER
P. Moller Scientific Computing and Graphics, Inc.,
P. O. Box 1440, Los Alamos, NM 87544, USA
and
Theoretical Division, Los Alamos National Laboratory, New Mexico
87545, USA
Akira IWAMOTO
Advanced Science Research Center,
Japan Atomic Energy Research Institute,
Tokai, Naka-gun, Ibaraki, 319-11 Japan
David G. Madland
Theoretical Division, Los Alamos National Laboratory, New Mexico
87545, USA
This paper was
was presented at the Specialists' Meeting on Interdisciplinary
Approach to Nuclear Fission, 2000, January 18-19, 2000,
Kyoto University Research Reactor Institute, Japan,
It has been assigned
Los Alamos National Laboratory Preprint No LA-UR-00-1435,
and will appear in a
Kyoto University Research Reactor Institute Report.
Abstract:
We calculate complete fission potential-energy surfaces for five
shape coordinates: elongation, neck diameter, light-fragment
deformation, heavy-fragment deformation, and mass asymmetry
for even nuclei in the range 81< Z < 101. The potential
energy is calculated in terms of the macroscopic-microscopic
model with a folded-Yukawa single-particle potential and
a Yukawa-plus-exponential macroscopic model in the
three-quadratic-surface parameterization.
The structure of the calculated energy landscapes
includes multiple valleys leading to different scission configurations.
The properties of these valleys and the saddle-points leading into these
valleys can be directly related to bimodal fission properties observed
in the radium region, in the light-actinide region, and in the fermium region
The light-actinide region has been extensively studied here in Japan.
The unzipped manuscript file is about 45 Mb. Because of very large figure file
sizes, up to 23 Mb, pages 18, 19, and 22 may take considerable time to print on
some printers.
The complete manuscript
is
available for download.
Page by
Peter Möller
Created: 2001 -->
Last modified: Thu July 5 2012