Velocity and angular distributions of evaporation residues from /sup 32/S-induced reactions

Journal Article · Tue Sep 01 00:00:00 EDT 1987 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.36.989· OSTI ID:6163689

Hinnefeld, J D; Kolata, J J; Henderson, D J; Janssens, R V.F.; Kovar, D G; Lesko, K T; Rosner, G; Stephans, G S.F.; van den Berg, A M; Wilkins, B D

Velocity distributions of mass-resolved evaporation residues from reactions of /sup 32/S with /sup 12/C, /sup 24/Mg, /sup 27/Al, /sup 28/Si, and /sup 40/Ca have been measured at bombarding energies of 194, 239, and 278 MeV using time-of-flight techniques. In all cases, the observed shifts in the velocity centroids relative to the values expected for complete fusion are consistent with a previously reported parametrization of a threshold for onset of incomplete fusion. Angular distributions were measured and total cross sections extracted for the /sup 32/S+ /sup 24/Mg system at all three energies. A comparison with existing results for /sup 32/S+ /sup 24/Mg at lower energies, and with other systems leading to the /sup 56/Ni compound nucleus, suggests two different types of compound-nuclear limitations to complete fusion at higher energies.

• Research Organization: Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556
• OSTI ID: 6163689
• Journal Information: Phys. Rev. C; (United States), Vol. 36:3
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 27 TARGET
SULFUR 32 REACTIONS
CALCIUM 40 TARGET
CARBON 12 TARGET
MAGNESIUM 24 TARGET
SILICON 28 TARGET
COMPOUND-NUCLEUS REACTIONS
HEAVY ION FUSION REACTIONS
ANGULAR DISTRIBUTION
ENERGY SPECTRA
EVAPORATION MODEL
MEV RANGE 100-1000
MONTE CARLO METHOD
NICKEL 56
TANDEM ELECTROSTATIC ACCELERATORS
TIME-OF-FLIGHT METHOD
TOTAL CROSS SECTIONS
ACCELERATORS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
ELECTROSTATIC ACCELERATORS
ENERGY RANGE
EVEN-EVEN NUCLEI
HEAVY ION REACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
NICKEL ISOTOPES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
RADIOISOTOPES
SPECTRA
TARGETS
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