Central collisions of relativistic heavy ions

Journal Article · Mon Aug 01 04:00:00 EDT 1977 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.16.629· OSTI ID:7209698

Gosset, J; Gutbrod, H H; Meyer, W G; Poskanzer, A M; Sandoval, A; Stock, R; Westfall, G D

The energy spectra of protons and light nuclei produced by the interaction of /sup 4/He and /sup 20/Ne projectiles with Al and U targets have been investigated at incident energies ranging from 0.25 to 2.1 GeV per nucleon. Single fragment inclusive spectra have been obtained at angles between 25/sup 0/ and 150/sup 0/, in the energy range from 30 to 150 MeV/nucleon. The multiplicity of intermediate and high energy charged particles was determined in coincidence with the measured fragments. In a separate study, fragment spectra were obtained in the evaporation energy range from /sup 12/C and /sup 20/Ne bombardment of uranium. We observe structureless, exponentially decaying spectra throughout the range of studied fragment masses. There is evidence for two major classes of fragments; one with emission at intermediate temperature from a system moving slowly in the lab frame, and the other with high temperature emission from a system propagating at a velocity intermediate between target and projectile. The high energy proton spectra are fairly well reproduced by a nuclear fireball model based on simple geometrical, kinematical, and statistical assumptions. Light cluster emission is also discussed in the framework of statistical models.

• Research Organization: Lawrence Berkeley Laboratory, Berkeley, California 94720
• OSTI ID: 7209698
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 16:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ALUMINIUM 27 TARGET
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
ENERGY RANGE
ENERGY SPECTRA
FIREBALL MODEL
GEV RANGE
GEV RANGE 01-10
GEV RANGE 10-100
HEAVY ION REACTIONS
MATHEMATICAL MODELS
MULTIPLICITY
NEON 20 REACTIONS
NUCLEAR REACTIONS
PARTICLE MODELS
PROTON SPECTRA
SPECTRA
STATISTICAL MODELS
TARGETS
URANIUM 238 TARGET