Particle-particle coincidence measurements for /sup 1,2,3/H and /sup 4/He in the reaction 480 MeV /sup 56/Fe+/sup nat/Ag

Journal Article · Wed Feb 01 04:00:00 EST 1989 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.39.488· OSTI ID:6530730

Peaslee, G F; Ajitanand, N N; Alexander, J M; Lacey, R; Vaz, L C; Kaplan, M; Kildir, M; Moses, D J; Logan, D; Zisman, M S; others, and

Particle-particle coincidence measurements have been made between light charged particles (/sup 1,2,3/H and /sup 4/He) produced in the reaction (8.5 MeV/nucleon) /sup 56/Fe+/sup nat/Ag. This coincidence requirement emphasizes central collisions leading to evaporation residues. Average multiplicities are found to be approximately three alphas and approximately four protons per evaporation residue; these values imply that approximately (1/2 the initial excitation energy of about 211 MeV is evacuated from the evaporation residues by these particles. This fractional energy evacuation by charged particles is considerably larger than that found for the similar reaction (8.5 MeV/nucleon) /sup 40/Ar+/sup nat/Ag. In both reactions the effective emission barriers for /sup 1/H and /sup 4/He (as deduced from the energy spectra) are found to be significantly lower than corresponding empirical fusion barriers between cold nuclei. This is particularly surprising for emitter nuclei that survive fission.

• Research Organization: Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794
• OSTI ID: 6530730
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 39:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ALPHA PARTICLES
BARYONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
DEUTERONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EVAPORATION MODEL
FERMIONS
HADRONS
HEAVY ION ACCELERATORS
HEAVY ION FUSION REACTIONS
HEAVY ION REACTIONS
HILACS
INELASTIC SCATTERING
IRON 56 REACTIONS
LINEAR ACCELERATORS
MATHEMATICAL MODELS
METALS
MEV RANGE
MEV RANGE 100-1000
MULTIPLICITY
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEONS
PROBABILITY
PROTONS
SCATTERING
SILVER
STATISTICAL MODELS
SUPERHILAC
TRANSITION ELEMENTS
TRITONS