Collective motion in nucleus-nucleus collisions at 800 MeV/nucleon

Journal Article · Fri Jul 01 04:00:00 EDT 1988 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.38.120· OSTI ID:6966067

Danielewicz, P; Stroebele, H; Odyniec, G; Bangert, D; Bock, R; Brockmann, R; Harris, J W; Pugh, H G; Rauch, W; Renfordt, R E; others, and

Semicentral Ar+KCl, La+La, and Ar+Pb collisions at 800 MeV/nucleon were studied using a streamer chamber. The results are analyzed in the framework of the transverse momentum analysis and in terms of the average sphericity matrix. A critical examination of the analysis procedures, both experimental and theoretical, is given. New procedures are described to account for overall momentum conservation in the reaction, and to correct for azimuthal variations in the detection efficiency. Average transverse momenta per nucleon in the reaction plane are presented for deuterons emitted in the forward hemisphere, as these provide the most reliable information. A Vlasov-Uehling-Uhlenbeck calculation with a stiff equation of state gives a good fit to the momenta in the Ar+Pb reaction. Flow effects parametrized further using the sphericity tensor are found stronger than in the cascade model and consistently weaker than predicted by hydrodynamics. Parameters from the sphericity tensor exhibit a larger variation as a function of multiplicity than do the average momenta per nucleon.

• Research Organization: Institute of Theoretical Physics, Warsaw University, 00-681 Warsaw, Poland Gesellschaft fuer Schwerionenforschung, D-6100 Darmstadt 11, Federal Republic of Germany Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 Fachbereich Physik, Universitaet Marburg, D-3550 Marburg,
• OSTI ID: 6966067
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 38:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651520* -- Nuclear Properties & Reactions
A=39-58
Experimental
651720 -- Nuclear Properties & Reactions
A=90-149
Experimental
651920 -- Nuclear Properties & Reactions
A=190-219
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL COMPOUNDS
ARGON
CHARGED-PARTICLE REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COMPOUND-NUCLEUS REACTIONS
CORRELATION FUNCTIONS
DISTRIBUTION FUNCTIONS
ELEMENTS
ENERGY RANGE
EQUATIONS
EQUATIONS OF STATE
FLUIDS
FUNCTIONS
GAS TRACK DETECTORS
GASES
GEV RANGE
GEV RANGE 10-100
GEV RANGE 100-1000
HALIDES
HALOGEN COMPOUNDS
HEAVY ION REACTIONS
LANTHANUM
LEAD
LINEAR MOMENTUM
LORENTZ TRANSFORMATIONS
MEASURING INSTRUMENTS
METALS
MULTIPLICITY
NONMETALS
NUCLEAR CASCADES
NUCLEAR REACTIONS
PARTICLE IDENTIFICATION
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
RADIATION DETECTORS
RARE EARTHS
RARE GASES
SPARK CHAMBERS
STREAMER SPARK CHAMBERS
TRANSFORMATIONS
TRANSVERSE MOMENTUM