Mechanism of nuclear dissipation in fission and heavy-ion reactions
Recent advances in the theoretical understanding of nuclear dissipation at intermediate excitation energies are reviewed, with particular emphasis on a new surface-plus-window mechanism that involves interactions of either one or two nucleons with the moving nuclear surface and also, for dumbbell-like shapes encountered in fission and heavy-ion reactions, the transfer of nucleons through the window separating the two portions of the system. This novel dissipation mechanism provides a unified macroscopic description of such diverse phenomena as widths of isoscalar giant quadrupole and giant octupole resonances, mean fission-fragment kinetic energies and excitation energies, dynamical thresholds for compound-nucleus formation, enhancement in neutron emission prior to fission, and widths of mass and charge distributions in deep-inelastic heavy-ion reactions. 41 refs., 8 figs.
- Research Organization:
- Los Alamos National Lab., NM (USA). Theoretical Div.
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5199660
- Report Number(s):
- LA-UR-86-3265; CONF-8609159-2; ON: DE87000160
- Resource Relation:
- Conference: International school-seminar on heavy ion physics, Dubna, USSR, 23 Sep 1986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FISSION
REACTION KINETICS
HEAVY ION REACTIONS
COMPOUND NUCLEI
EXCITATION
FISSION FRAGMENTS
GIANT RESONANCE
NEUTRON EMISSION
THEORETICAL DATA
CHARGED-PARTICLE REACTIONS
DATA
EMISSION
ENERGY-LEVEL TRANSITIONS
INFORMATION
KINETICS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUMERICAL DATA
RESONANCE
653003* - Nuclear Theory- Nuclear Reactions & Scattering
653006 - Nuclear Theory- Spontaneous & Induced Fission