Multiple preequilibrium emission in Feshbach-Kerman-Koonin analyses

Journal Article · Mon Aug 01 00:00:00 EDT 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.50.996· OSTI ID:7263768

Chadwick, M B ^[1]; Young, P G; George, D C ^[2]; Watanabe, Y ^[3]

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1. Nuclear Data Group, University of California, Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
2. Theoretical Division, University of California, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. Department of Energy Conversion Engineering, Kyushu University, Kasuga, Fukuoka 816 (Japan)

We describe how multiple preequilibrium emission can be included in the Feshbach-Kerman-Koonin (FKK) theory. By analyzing ([ital p],[ital xn]) and ([ital p],[ital xp]) reactions on zirconium, at incident energies of 80 and 160 MeV, the imporance of multiple preequilibrium emission can be clearly seen. This mechanism accounts for much of the emission spectra and its importance extends to relatively high emission energies. We show that multiple preequilibrium must be included in FKK analyses at these incident energies in order to simultaneously satisfy unitarity and account for inclusive nucleon emission spectra. The importance of multistep processes is reduced in comparsion to analyses which omit multiple preequilibrium. Our calculated angular distributions account for measurements except at the highest backward angles, where we underpredict the data. We compare our results with other analyses at these energies.

• DOE Contract Number: W-7405-ENG-48; W-7405-ENG-36
• OSTI ID: 7263768
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 50:2; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663300 -- Nuclear Reactions & Scattering
General-- (1992-)
663430* -- Nucleon-Induced Reactions & Scattering-- (1992-)
663560 -- Nuclear Mass Ranges-- A=90-149-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
DECAY
DIRECT REACTIONS
EMISSION
EMISSION SPECTRA
ENERGY RANGE
HADRON REACTIONS
INELASTIC SCATTERING
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
NEUTRON EMISSION
NUCLEAR DECAY
NUCLEAR REACTIONS
NUCLEON REACTIONS
PROTON REACTIONS
PROTON-EMISSION DECAY
SCATTERING
SPECTRA
STATISTICAL MODELS
TARGETS
ZIRCONIUM 91 TARGET