Spectra of p, d, and t from relativistic nuclear collisions

Journal Article · Tue Apr 01 04:00:00 EST 1980 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.21.1321· OSTI ID:5409917

Sandoval, A; Gutbrod, H H; Meyer, W G; Stock, R; Lukner, C; Poskanzer, A M; Gosset, J; Jourdain, J; King, C H; King, G; Sen, N V; Westfall, G D; Wolf, K L

Inclusive energy spectra of protons, deuterons, and tritons were measured with a telescope of silicon and germanium detectors with a detection range for proton energies up to 200 MeV. Fifteen sets of data were taken using projectiles ranging from protons to /sup 40/Ar on targets from /sup 27/Al to /sup 238/U at bombarding energies from 240 MeV/nucleon to 2.1 GeV/nucleon. Particular attention was paid to the absolute normalization of the cross sections. For three previously reported reactions, He fragment cross sections have been corrected and are presented. To facilitate a comparison with theory the sum of nucleonic charges emitted as protons plus composite particles was estimated and is presented as a function of fragment energy per nucleon in the interval from 15 to 200 MeV/nucleon. For low-energy fragments at forward angles the protons account for only 25% of the nucleonic charges. The equal mass /sup 40/Ar plus Ca systems were examined in the center of mass. Here at 0.4 GeV/nucleon /sup 40/Ar plus Ca the proton spectra appear to be nearly isotropic in the center of mass over the region measured. Comparisons of some data with firestreak, cascade, and fluid dynamics models indicate a failure of the first and a fair agreement with the latter two. In addition, associated fast charged particle multiplicities (where the particles had energies larger than 25 MeV/nucleon) and azimuthal correlations were measured with an 80 counter array of plastic scintillators. It was found that the associated multiplicities were a smooth function of the total kinetic energy of the projectile.

• Research Organization: Gesellschaft fuer Schwerionenforschung, Darmstadt, West Germany
• OSTI ID: 5409917
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 21:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDES
ALKALINE EARTH METALS
ALUMINIUM
ARGON 40 REACTIONS
BARYON REACTIONS
CALCIUM
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DEUTERON SPECTRA
ELEMENTS
ENERGY
ENERGY RANGE
ENERGY SPECTRA
FRAGMENTATION
GEV RANGE
GOLD
HADRON REACTIONS
HEAVY ION REACTIONS
HELIUM 3 REACTIONS
INCLUSIVE INTERACTIONS
INTERACTIONS
KINETIC ENERGY
METALS
MULTIPLICITY
NEON 20 REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PARTICLE INTERACTIONS
PROTON REACTIONS
PROTON SPECTRA
RELATIVISTIC RANGE
SILVER
SPECTRA
TRANSITION ELEMENTS
TRITONS
URANIUM