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Production of fast. cap alpha. particles in /sup 20/Ne+ /sup 197/Au collisions studied by counting the simultaneously emitted neutrons

Journal Article · · Phys. Rev. C; (United States)
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The number of neutrons emitted in heavy-ion reactions is counted eventwise with high efficiency in a 4..pi.. neutron counting device. This number is taken as a measure of the energy converted into internal excitation of the heavy reaction residues produced in /sup 20/Ne+ /sup 197/Au collisions at 220, 290, and 400 MeV. Forward emitted ..cap alpha.. particles are found preferentially with either a low number of coincident neutrons or a high neutron number. The former component is identified with ..cap alpha.. particles produced by projectile breakup, the latter with nonequilibrium emission of ..cap alpha.. particles. The inclusive cross section can be decomposed into the contributions of these two processes, and separate energy distributions and excitation functions are given. The nonequilibrium component is compatible with a massive-transfer picture of the responsible process.
Research Organization:
Bereich Kern- und Strahlenphysik, Hahn-Meitner-Institut, D 1000 Berlin 39, Federal Republic of Germany
OSTI ID:
6158562
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 31:2; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651925* -- Nuclear Properties & Reactions
A=190-219
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
ANGULAR DISTRIBUTION
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
DISTRIBUTION
EMISSION
ENERGY RANGE
ENERGY SPECTRA
EXCITATION FUNCTIONS
FUNCTIONS
GOLD 197 TARGET
HEAVY ION REACTIONS
INCLUSIVE INTERACTIONS
INTERACTIONS
MEV RANGE
MEV RANGE 100-1000
NEON 20 REACTIONS
NEUTRON EMISSION
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
PRECOMPOUND-NUCLEUS EMISSION
SPECTRA
TARGETS