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Title: Mechanism of nuclear dissipation in fission and heavy-ion reactions

Abstract

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.

Authors:
;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (USA). Theoretical Div.
OSTI Identifier:
5199660
Report Number(s):
LA-UR-86-3265; CONF-8609159-2
ON: DE87000160
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Technical Report
Resource Relation:
Conference: International school-seminar on heavy ion physics, Dubna, USSR, 23 Sep 1986
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 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

Citation Formats

Nix, J R, and Sierk, A J. Mechanism of nuclear dissipation in fission and heavy-ion reactions. United States: N. p., 1986. Web. doi:10.2172/5199660.
Nix, J R, & Sierk, A J. Mechanism of nuclear dissipation in fission and heavy-ion reactions. United States. https://doi.org/10.2172/5199660
Nix, J R, and Sierk, A J. 1986. "Mechanism of nuclear dissipation in fission and heavy-ion reactions". United States. https://doi.org/10.2172/5199660. https://www.osti.gov/servlets/purl/5199660.
@article{osti_5199660,
title = {Mechanism of nuclear dissipation in fission and heavy-ion reactions},
author = {Nix, J R and Sierk, A J},
abstractNote = {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.},
doi = {10.2172/5199660},
url = {https://www.osti.gov/biblio/5199660}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1986},
month = {Wed Jan 01 00:00:00 EST 1986}
}