Computer simulations of fragmentation in nuclear reactions: A semiclassical model

Journal Article · Sun Feb 01 04:00:00 EST 1987 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.35.545· OSTI ID:5958600

Beauvais, G E; Boal, D H; Wong, J C.K.

A semiclassical model is used to perform numerical simulations of the production of nuclear fragments in both proton- and heavy-ion-induced reactions. The Pauli principle is incorporated by means of a collision term, as it is in the Vlasov-Uehling-Uhlenbeck equation. The model goes beyond the Vlasov-Uehling-Uhlenbeck equation by propagating on an event-by-event basis the phase space fluctuations which develop during a nuclear reaction. Both the Coulomb and isospin-dependent interaction terms are included. For proton-induced reactions at intermediate energies, fragment production is found to be a fairly infrequent process, as is observed experimentally. Heavy-ion reactions show much greater fragment yields. For these latter reactions, we have compiled sufficiently many events so as to be able to compare the predicted fragment yields with experiment. The isotopic distribution of products, as well as their distribution in momentum space, are also examined. The events are used to generate a two-particle correlation function. Analysis of the energy-summed two-proton correlations indicates a large source region. The coordinate and phase space reaction trajectories are followed for a central collision, and preliminary evidence is found in the simulations for the onset of mechanical instability.

• Research Organization: Department of Physics, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
• OSTI ID: 5958600
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 35:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
CHARGED-PARTICLE REACTIONS
COMPUTERIZED SIMULATION
CORRELATION FUNCTIONS
COULOMB FIELD
DIFFERENTIAL EQUATIONS
ELECTRIC FIELDS
ENERGY SPECTRA
EQUATIONS
EQUATIONS OF MOTION
FRAGMENTATION
FUNCTIONS
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HARTREE-FOCK METHOD
HEAVY ION REACTIONS
INTERACTIONS
ISOSPIN
MATHEMATICAL SPACE
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PAULI PRINCIPLE
PHASE SHIFT
PHASE SPACE
PROTON REACTIONS
SEMICLASSICAL APPROXIMATION
SIMULATION
SPACE
SPECTRA
TIME DEPENDENCE