GSI-LBL plastic ball/wall spectrometer

Conference · Sat Sep 01 00:00:00 EDT 1984

OSTI ID:6456953

Gustafsson, H A; Doss, K G.R.; Gutbrod, H H; Kolb, B; Ludewigt, B; Poskanzer, A M; Renner, T; Riedesel, H; Ritter, H G; Warwick, A

For the high multiplicity events occurring in relativistics nuclear collisions an electronic 4..pi.. detector with particle identification has been built. It consists of 815 ..delta..E - E telescopes and 176 TOF telescopes covering 97% of 4..pi... Very good particle identification has been obtained for hydrogen and helium isotopes and also ..pi../sup +/ have been detected with high efficiency. This spectrometer was used at the Berkeley Bevalac to study the reactions Ca + Ca, Nb + Nb and Au + Au at energies between 0.15 and 1.05 GeV/nucleon. Various exclusive observables like the degree of thermalization, the multiplicity dependence of composite particle formation, and freeze-out densities are discussed. From global analyses the collective flow of nuclear matter has been deduced. A method of separating efficiently participant and spectator particles has been applied in order to disentangle the two collective effects: The side-splash of the participants and the bounce-off in the fragmentation region. 9 references, 11 figures.

• Research Organization: Lawrence Berkeley Lab., CA (USA); Gesellschaft fuer Schwerionenforschung m.b.H., Darmstadt (Germany, F.R.)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6456953
• Report Number(s): LBL-18380; CONF-841005-1; ON: DE85001651
• Resource Relation: Conference: Instrumentation for heavy ion nuclear research conference, Oak Ridge, TN, USA, 22 Oct 1984; Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
HEAVY ION REACTIONS
FRAGMENTATION
TELESCOPE COUNTERS
OPERATION
PARTICLE IDENTIFICATION
CALCIUM 40 REACTIONS
CALCIUM 40 TARGET
FOUR-PI COUNTING
GEV RANGE 01-10
GOLD 197 REACTIONS
GOLD 197 TARGET
HELIUM ISOTOPES
HYDROGEN ISOTOPES
MEV RANGE 100-1000
MULTIPLICITY
NIOBIUM 93 REACTIONS
NIOBIUM 93 TARGET
NUCLEAR MATTER
PION DETECTION
TIME-OF-FLIGHT METHOD
CHARGED PARTICLE DETECTION
CHARGED-PARTICLE REACTIONS
COUNTING TECHNIQUES
DETECTION
ENERGY RANGE
GEV RANGE
ISOTOPES
MATTER
MEV RANGE
NUCLEAR REACTIONS
RADIATION DETECTION
TARGETS
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments
651100 - Nuclear Physics- Experimental Techniques- (1980-)