Five-Dimensional Potential-Energy Surfaces and Coexisting Fission Modes in Heavy Nuclei.

Moller, P. ; Madland, D.

Technical Information Center Oak Ridge Tennessee

关键词: Fission;    Heavy nuclei;    Potential energy;   

RP-ID  :  DE2001766738

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

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 82< Z <100. 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 exhibits multiple valleys leading to different scission configurations. The properties of these valleys and the saddle-points at the beginning of 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 1-4.