Sources of light particles from fusion-like processes in the /sup 20/Ne+/sup 27/Al reaction at 19. 2 MeVnucleon
Journal Article
·
· Phys. Rev. C; (United States)
We have measured light-particle energy spectra over a 90/sup 0/ range of angles in the forward hemisphere in coincidence with heavy residues from the reaction /sup 20/Ne+/sup 27/Al at 19.2 MeVnucleon. A selection on residues with Zgreater than or equal to11 removes the contributions of deep-inelastic scattering and peripheral processes from the fusion-like cross section. With the help of a simple analytic model that includes the coincidence kinematics we are able to describe the data and extract multiplicities, primary-energy distributions, and source velocities for the light particles from fusion-like reactions. The mass difference between the observed fragments and the compound system comes almost exclusively from light particles with Zless than or equal to2. The evaporated ..cap alpha.. particles are more energetic and more numerous than the statistical model implies. The fast ..cap alpha.. particles have distributions consistent with a fragmentation-fusion picture; however, they account for at most (13 of the momentum lost in the incomplete fusion process.
- Research Organization:
- Fysisch Laboratorium, Rijksuniversiteit Utrecht, 3508 TA Utrecht, The Netherlands
- OSTI ID:
- 5261914
- Journal Information:
- Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 37:6; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
651420* -- Nuclear Properties & Reactions
A=20-38
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ALPHA SPECTRA
ALUMINIUM 27 TARGET
ANGULAR DISTRIBUTION
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
CROSS SECTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DISTRIBUTION
ENERGY RANGE
ENERGY SPECTRA
EVAPORATION MODEL
FRAGMENTATION
HEAVY ION FUSION REACTIONS
HEAVY ION REACTIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
MULTIPLICITY
NEON 20 REACTIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
PRECOMPOUND-NUCLEUS EMISSION
SPECTRA
STATISTICAL MODELS
TARGETS
A=20-38
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ALPHA SPECTRA
ALUMINIUM 27 TARGET
ANGULAR DISTRIBUTION
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
CROSS SECTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DISTRIBUTION
ENERGY RANGE
ENERGY SPECTRA
EVAPORATION MODEL
FRAGMENTATION
HEAVY ION FUSION REACTIONS
HEAVY ION REACTIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
MULTIPLICITY
NEON 20 REACTIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
PRECOMPOUND-NUCLEUS EMISSION
SPECTRA
STATISTICAL MODELS
TARGETS