Proton-helium correlation in 94 MeV/nucleon sup 16 O-induced reactions on Al, Ni, and Au targets

Journal Article · Wed Apr 01 00:00:00 EST 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.45.1730· OSTI ID:7113822

Badala, A; Barbera, R; Palmeri, A; Pappalardo, G S ^[1]; Riggi, F ^[2]; Bizard, G; Durand, D; Laville, J L ^[3]

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1. Istituto Nazionale di Fisica Nucleare, Sezione di Catania Universita di Catania, Corso Italia 57, I95129 Catania (Italy)
2. Istituto Nazionale di Fisica Nucleare, Sezione di Catania, and Dipartimento di Fisica, Universita di Catania, Corso Italia 57, I95129 Catania (Italy)
3. Laboratoire de Physique Corpusculaire LA34-ISMRA, Institut National de Physique Nucleaire et de Physique des Particules, Centre National de la Recherche Scientifique, Universite de Caen, 14050 Caen CEDEX (France)

Azimuthal distributions of helium ions have been measured in coincidence with high-energy protons in reactions induced by {sup 16}O at 94 MeV/nucleon on {sup 27}Al, {sup 58}Ni, and {sup 197}Au. Helium ions have been detected in a large area multidetector. Protons have been observed at 90{degree}. Mean multiplicities of light charged particles (H and He) are found slightly dependent on the target mass. Strong azimuthal asymmetries whose intensity is larger for the Al target and vanishes with the increasing of the target mass are observed in the He distributions. Experimental data are discussed in the framework of the participant-spectator picture of a modified fireball model, taking into account intermediate energy corrections. In this framework the behavior of the azimuthal asymmetries, as a function of the target mass, indicates a strong final-state interaction between participant and spectator fragments. Such a result is found in agreement with interaction time predictions of a microscopical calculation based on the Boltzmann-Nordheim-Vlasov equation.

• OSTI ID: 7113822
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 45:4; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 27 TARGET
OXYGEN 16 REACTIONS
GOLD 197 TARGET
NICKEL 58 TARGET
ALPHA SPECTRA
ANGULAR DISTRIBUTION
BOLTZMANN EQUATION
COINCIDENCE METHODS
CORRELATION FUNCTIONS
GEV RANGE 01-10
MULTIPLICITY
NUCLEAR FIREBALL MODEL
PROTON SPECTRA
CHARGED-PARTICLE REACTIONS
COUNTING TECHNIQUES
DIFFERENTIAL EQUATIONS
DISTRIBUTION
ENERGY RANGE
EQUATIONS
FUNCTIONS
GEV RANGE
HEAVY ION REACTIONS
MATHEMATICAL MODELS
NUCLEAR MODELS
NUCLEAR REACTIONS
PARTIAL DIFFERENTIAL EQUATIONS
SPECTRA
TARGETS
663450* - Heavy-Ion-Induced Reactions & Scattering- (1992-)