Neutron-fragment coincidence measurements in /sup 14/Ni + /sup 165/Ho and /sup 14/N + Ni reactions at 35 MeV/nucleon

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6844369

Remington, B A

The author has studied /sup 14/Ni + /sup 165/Ho and /sup 14/N + Ni collisions at 35 MeV/nucleon by detecting neutrons in coincidence with light fragments. Strong preequilibrium neutron emission is observed at forward and middle angles. The preequilibrium component of the neutron spectra is symmetric about the beam axis for all but the most peripheral interactions, where more neutrons are observed on the side of the beam opposite the detected light fragment. The moving-sources picture is utilized to extract systematic trends with light-fragment angle in the preequilibrium component of the neutron spectra and in the component from the target-like source. The target-like source multiplicity is compared with predictions from the statistical code CASCADE, revealing an angle-dependent different between calculated and measured multiplicity. Comparisons with a two-body calculation show that there is considerable missing momentum, only part of which can be accounted for by preequilibrium neutron emission.

• Research Organization: Michigan State Univ., East Lansing (USA)
• OSTI ID: 6844369
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BARYONS
C CODES
CHARGED-PARTICLE REACTIONS
COINCIDENCE METHODS
COMPUTER CODES
COUNTING TECHNIQUES
DATA
DISTRIBUTION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
HADRONS
HEAVY ION REACTIONS
HOLMIUM 165 TARGET
INFORMATION
METALS
MEV RANGE
MEV RANGE 100-1000
MULTIPLICITY
NEUTRONS
NICKEL
NITROGEN 14 REACTIONS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUCLEONS
NUMERICAL DATA
PRECOMPOUND-NUCLEUS EMISSION
TARGETS
TRANSITION ELEMENTS