Effect of dissipation on dynamical fusion thresholds

Technical Report · Wed Jan 01 00:00:00 EST 1986

DOI:https://doi.org/10.2172/5707806· OSTI ID:5707806

Sierk, A J

The existence of dynamical thresholds to fusion in heavy nuclei (A greater than or equal to 200) due to the nature of the potential-energy surface is shown. These thresholds exist even in the absence of dissipative forces, due to the coupling between the various collective deformation degrees of freedom. Using a macroscopic model of nuclear shape dynamics, It is shown how three different suggested dissipation mechanisms increase by varying amounts the excitation energy over the one-dimensional barrier required to cause compound-nucleus formation. The recently introduced surface-plus-window dissipation may give a reasonable representation of experimental data on fusion thresholds, in addition to properly describing fission-fragment kinetic energies and isoscalar giant multipole widths. Scaling of threshold results to asymmetric systems is discussed. 48 refs., 10 figs.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5707806
• Report Number(s): LA-UR-86-1175; ON: DE86010168
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
HEAVY ION FUSION REACTIONS
THRESHOLD ENERGY
FISSION FRAGMENTS
GIANT RESONANCE
KINETIC ENERGY
MULTIPOLES
NUCLEAR MODELS
PALLADIUM
POTENTIAL ENERGY
THEORETICAL DATA
DATA
ELEMENTS
ENERGY
INFORMATION
MATHEMATICAL MODELS
METALS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUMERICAL DATA
PLATINUM METALS
RESONANCE
TRANSITION ELEMENTS
653003* - Nuclear Theory- Nuclear Reactions & Scattering