Preequilibrium neutron emission in the reactions /sup 90/Zr, /sup 208/Pb(p,xn) with 80 MeV projectiles

Journal Article · Wed Feb 01 04:00:00 EST 1989 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.39.452· OSTI ID:6388705

Trabandt, M; Scobel, W; Blann, M; Pohl, B A; Byrd, R C; Foster, C C; Bonetti, R

The reactions /sup 90/Zr, /sup 208/Pb(p,xn) have been measured with 80.5 MeV protons in the neutron continuum E/sub n/>20 MeV and the angular range 0/sup 0/less than or equal tothetaless than or equal to145/sup 0/. Whereas the angle-integrated spectrum can be explained by semiclassical preequilibrium models, this nucleon-nucleon scattering approach fails at far backward angles. In contrast, the quantum statistical multistep calculations give good agreement. They are indicative of a decrease of the effective nucleon-nucleon interaction with increasing nucleon energy.

• Research Organization: Institut fuer Experimentalphysik, Universitaet Hamburg, Hamburg, Federal Republic of Germany
• OSTI ID: 6388705
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 39:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651720* -- Nuclear Properties & Reactions
A=90-149
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651920 -- Nuclear Properties & Reactions
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Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
CHARGED-PARTICLE REACTIONS
DISTRIBUTION
EMISSION
ENERGY RANGE
FUNCTIONS
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
LEAD 208 TARGET
MATHEMATICAL MODELS
MECHANICS
MEV RANGE
MEV RANGE 10-100
NEUTRON EMISSION
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PRECOMPOUND-NUCLEUS EMISSION
PROTON REACTIONS
QUANTUM MECHANICS
RESPONSE FUNCTIONS
SCATTERING
SEMICLASSICAL APPROXIMATION
STATISTICAL MODELS
TARGETS
TIME-OF-FLIGHT METHOD
ZIRCONIUM 90 TARGET