Precompound emission of light particles in the reaction /sup 16/O+/sup 238/U at 20 MeV/nucleon

Journal Article · Wed Jul 01 04:00:00 EDT 1981 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.24.89· OSTI ID:6438220

Awes, T C; Poggi, G; Gelbke, C K; Back, B B; Glagola, B G; Breuer, H; Viola, Jr, V E

Double differential cross sections have been measured for energetic p, d, t, and ..cap alpha.. particles emitted in reactions of 315 MeV /sup 16/O ions on /sup 238/U. In coincidence with light-particle emission, the momentum transfer to the target is determined by measuring the folding angle between the two fission fragments resulting from the sequential decay of the target nucleus. It is concluded that the emission of these particles occurs predominantly in fusionlike ''central'' collisions and at an early stage of the reaction. The energy and angular distributions are described by thermal emission from a source moving with approximately half of the beam velocity. Alternatively, the energy spectra can be explained by emission from a rotating hot spot. The cross sections for d, t, and ..cap alpha.. emission can be described in terms of a generalized form of the coalescence model which takes into account the Coulomb repulsion from the target nucleus.

• Research Organization: Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
• OSTI ID: 6438220
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 24:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

652025* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Nuclear Reactions & Scattering-- (-1987)
652026 -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
ANGULAR DISTRIBUTION
BARYONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COULOMB FIELD
CROSS SECTIONS
DEUTERONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELECTRIC FIELDS
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY SPECTRA
FERMIONS
FISSION FRAGMENTS
HADRONS
HEAVY ION REACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUCLEONS
OXYGEN 16 REACTIONS
PRECOMPOUND-NUCLEUS EMISSION
PROTONS
SPECTRA
TARGETS
TRITONS
URANIUM 238 TARGET