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Note on neutron scattering and the optical model near A = 208. [0. 6 to 1. 0 MeV]

Technical Report ·
DOI:https://doi.org/10.2172/7340098· OSTI ID:7340098
; ;
Elastic neutron scattering cross sections of /sup 206/Pb, /sup 207/Pb, /sup 208/Pb and /sup 209/Bi are measured at incident neutron energy intervals of approx. 25 keV from 0.6 to 1.0 MeV with resolutions of approx. 25 keV. Optical model parameters are obtained from the energy-averaged experimental results for each of the isotopes. The observed elastic-neutron-scattering distributions and derived parameters for the lead isotopes (doubly magic or neutron holes in the closed shell) tend to differ from those of /sup 209/Bi (doubly closed shell plus a proton). These potentials, derived in the approx. spherical region of A approximately 208, are extrapolated for the analysis of total and scattering cross sections of /sup 238/U introducing only a small N-Z/A dependence and the known deformation of /sup 238/U. Good descriptions of /sup 238/U total cross sections are obtained from a few hundred keV to 10.0 MeV and the prediction of measured scattering distributions in the low MeV region are as suitable as frequently reported with other specially developed potentials.
Research Organization:
Argonne National Lab., Ill. (USA)
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
7340098
Report Number(s):
ANL/NDM-22
Country of Publication:
United States
Language:
English

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Related Subjects

651925* -- Nuclear Properties & Reactions
A=190-219
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BARYON REACTIONS
BARYONS
BISMUTH 209
BISMUTH 209 TARGET
BISMUTH ISOTOPES
CROSS SECTIONS
DISTRIBUTION
ELASTIC SCATTERING
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
HADRON REACTIONS
HADRONS
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEAD 206
LEAD 206 TARGET
LEAD 207
LEAD 207 TARGET
LEAD 208
LEAD 208 TARGET
LEAD ISOTOPES
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-EVEN NUCLEI
OPTICAL MODELS
OPTICAL MODELS LEAD 206
RADIOISOTOPES
SCATTERING
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
TARGETS
URANIUM 238 TARGET