Measurements and calculations of neutron scattering in the actinide region

Journal Article · Mon Dec 01 00:00:00 EST 1986 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.34.2075· OSTI ID:7160397

Hansen, L F; Pohl, B A; Wong, C; Haight, R C; Lagrange, C

Neutron scattering differential cross sections were measured for /sup 232/Th, /sup 238/U, and /sup 239/Pu at 14.1 MeV. Optical model calculations were performed using the coupled-channel formalism for deformed nuclei as given by Tamura. Several microscopic and phenomenological optical model potentials were tested for these heavy nuclei: (i) a folding optical model potential using the microscopic nucleon-nucleon effective interaction of Jeukenne, Lejeune, and Mahaux with deformed nuclear density distributions (these calculations are addressed in the text as semimicroscopic optical model potentials), (ii) global phenomenological optical model potentials optimized for the actinide region, and (iii) neutron potentials derived from 35 MeV proton optical potentials using the Lane formalism. The total cross sections calculated from these optical model potentials at 14.1 MeV are also compared with measurements in the literature. The semimicroscopic calculations reproduce reasonably well the measured angular distributions with only two free parameters used to optimize fits to the data. The calculations carried out with optical potentials inferred from proton data give good agreement with the neutron data, an agreement which is similar to that between calculational results using neutron global potentials optimized for this mass region and the measured data.

• Research Organization: Lawrence Livermore National Laboratory, Livermore, California 94550
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7160397
• Journal Information: Phys. Rev. C; (United States), Vol. 34:6
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
NEUTRON REACTIONS
ELASTIC SCATTERING
INELASTIC SCATTERING
PLUTONIUM 239 TARGET
THORIUM 232 TARGET
URANIUM 238 TARGET
ANGULAR DISTRIBUTION
COUPLED CHANNEL THEORY
DEFORMED NUCLEI
DIFFERENTIAL CROSS SECTIONS
EXPERIMENTAL DATA
MEV RANGE 10-100
NUCLEON-NUCLEON INTERACTIONS
OPTICAL MODELS
TOTAL CROSS SECTIONS
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
CROSS SECTIONS
DATA
DISTRIBUTION
ENERGY RANGE
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
INFORMATION
INTERACTIONS
MEV RANGE
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
SCATTERING
TARGETS
653003* - Nuclear Theory- Nuclear Reactions & Scattering
652020 - Nuclear Properties & Reactions
A=220 & above
Experimental