Pion and light fragment production in nucleus-nucleus collisions and the importance of Coulomb final state interactions
Utilizing an existing microcanonical model of nuclear disassembly, they study the production of light fragments in nucleus-nucleus collisions. They pay particular attention to pions because they are expected to be a sensitive robe of the hot and dense nuclear matter and because of the availability of data. Introducing the ..delta..-resonance in the available phase space and taking into account the collective motion of nuclear matter, they obtained good agreement with the pion data for beam energies from 0.4 to 2.0 GeV/nucleon. This result shows that the ..delta..-isobar is a source for pions and that nuclear matter exhibits a degree of collective motion. Guided by recent neutron data, they develop a simple model that incorporates a description of Coulomb effects to study low-energy nucleon angular distributions and neutron-to-proton cross section ratios. They explain the observed relative isotropy in the proton angular distributions and the rising tendency in the n/p cross section ratios of the final system with decreasing energy. With the insight afforded by this simple model, they present an approximate classical dynamic treatment of electromagnetic final-state interactions.
- Research Organization:
- Kent State Univ., OH (USA)
- OSTI ID:
- 6060422
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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NUCLEAR REACTIONS
PARTICLE PRODUCTION
SPALLATION
ANGULAR DISTRIBUTION
COULOMB FIELD
CROSS SECTIONS
DELTA-1236 RESONANCES
ENERGY DEPENDENCE
FINAL-STATE INTERACTIONS
GEV RANGE 01-10
LIGHT NUCLEI
NEUTRONS
NUCLEAR MATTER
NUCLEAR MODELS
PIONS
PROTONS
THEORETICAL DATA
BARYONS
BOSONS
DATA
DISTRIBUTION
ELECTRIC FIELDS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
HADRONS
INFORMATION
INTERACTIONS
MATHEMATICAL MODELS
MATTER
MESONS
NUCLEI
NUCLEONS
NUMERICAL DATA
PSEUDOSCALAR MESONS
653003* - Nuclear Theory- Nuclear Reactions & Scattering
653002 - Nuclear Theory- Nuclear Matter