Breakup of spectator residues in relativistic nuclear collisions
Low energy nuclear fragments (12< or =A< or =140) from the bombardment of Au by high energy protons, /sup 4/He, and /sup 20/Ne projectiles are measured to yield information on the breakup of the target nucleus. We discuss the shapes of the fragment energy spectra across this broad range of fragment mass and pick out the fission component by its binary breakup. Multiplicities of coincident fast charged particles are presented as a measure of the degree of violence of the initial stage of the collision. Angular distributions of light fragments (8< or =Z< or =11) give the average velocities imparted to the residue in central collisions, and these values are compared to the results of cascade calculations. Measurements of slow fragment multiplicities from central events reveal a many-fragment final state. In the light of this finding we develop a simple calculation of the Coulomb features of the observed spectra. The applicability of a statistical breakup model is discussed.
- Research Organization:
- Gesellschaft fuer Schwerionenforschung, D-1600 Darmstadt, Federal Republic of Germany
- OSTI ID:
- 5905889
- Journal Information:
- Phys. Rev. C; (United States), Vol. 27:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALPHA REACTIONS
FRAGMENTATION
GOLD 197 TARGET
NEON 20 REACTIONS
PROTON REACTIONS
ANGULAR DISTRIBUTION
BREAKUP REACTIONS
COINCIDENCE SPECTROMETRY
DIFFERENTIAL CROSS SECTIONS
GEV RANGE 01-10
GEV RANGE 10-100
MULTIPLICITY
STATISTICAL MODELS
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DISTRIBUTION
ENERGY RANGE
GEV RANGE
HADRON REACTIONS
HEAVY ION REACTIONS
MATHEMATICAL MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
TARGETS
651925* - Nuclear Properties & Reactions
A=190-219
Experimental- Nuclear Reactions & Scattering- (-1987)