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Neutron and photon production from thick targets bombarded by 30-MeV p, 33-MeV d, 65-MeV /sup 3/He, and 65-MeV. cap alpha. ions: Phenomenological analysis of experimental neutron energy spectra

Journal Article · · Phys. Rev. C; (United States)
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The measured energy spectra, reported in the preceding paper, of neutrons produced from thick carbon, copper, and lead targets exposed to 30-MeV protons, 33-MeV deuterons, 65-MeV /sup 3/He, and 65-MeV alpha particles were analyzed with the phenomenological hybrid model of equilibrium and preequilibrium emissions, together with the Serber model for deuteron stripping. Both spectral components of equilibrium and preequilibrium were well fitted to two Maxwellian-type functions having different nuclear temperatures. The former temperature values were only a function of the excited energy of the compound nucleus per nucleon, independently of the neutron emission angle, while on the other hand, the latter temperature values were dependent on the emission angle and the total energy delivered into the compound nucleus by the projectile. For deuteron, /sup 3/He, and alpha projectiles, a broad bump was seen in the forward spectrum which corresponds to the direct knockout and the deuteron and /sup 3/He breakup processes. The deuteron breakup process calculated by the Serber model showed rather good agreement with the measured spectrum.

Research Organization:
Institute for Nuclear Study, University of Tokyo, Midori-cho 3-2-1, Tanashi, Tokyo, Japan
OSTI ID:
6777347
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 29:4; ISSN PRVCA
Country of Publication:
United States
Language:
English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
BARYON REACTIONS
BARYONS
BREAKUP REACTIONS
CARBON
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
COPPER
CROSS SECTIONS
DATA
DEUTERON REACTIONS
DIRECT REACTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EVAPORATION MODEL
EXPERIMENTAL DATA
FERMIONS
HADRON REACTIONS
HADRONS
HELIUM 3 REACTIONS
INFORMATION
KNOCK-OUT REACTIONS
LEAD
MASSLESS PARTICLES
MATHEMATICAL MODELS
METALS
MEV RANGE
MEV RANGE 10-100
MONTE CARLO METHOD
NEUTRON SPECTRA
NEUTRONS
NONMETALS
NUCLEAR CASCADES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
PARTICLE PRODUCTION
PHOTONS
PRECOMPOUND-NUCLEUS EMISSION
PROTON REACTIONS
SERBER THEORY
SPECTRA
STRIPPING
TRANSFER REACTIONS
TRANSITION ELEMENTS