Energy dependence of the optical model of neutron scattering from niobium
Neutron differential-elastic-scattering cross sections of niobium were measured from 1.5 to 10.0 MeV at intervals of less than or equal to200 keV below 4.0 MeV, and of approx. =500 keV from 4.0 to 10.0 MeV. Ten to more than fifty differential-cross-section values were determined at each incident energy, distributed over the angular range approx. =20 to 160/sup 0/. The observed values were interpreted in the context of the spherical optical-statistical model. It was found that the volume integral of the real potential decreased with energy whereas the integral of the imaginary part increased. The energy dependence in both cases was consistent with a linear variation. There is a dispersion relationship between the real and imaginary potentials, and when this was used, in conjunction with the experimental imaginary potential, it was possible to predict the observed energy dependence of the real potential to a good degree of accuracy, thus supporting the consistency of the data and its analysis. The real-potential well depths needed to give the correct binding energies of the 2d/sub 5/2/, 3s/sub 1/2/, 2d/sub 3/2/ and 1g/sub 7/2/ particle states and of the 1g/sub 9/2/ hole state are in reasonable agreement with those given by a linear extrapolation of the scattering potential. However, the well depths needed to give the observed binding of the 2p/sub 3/2/, 1f/sub 5/2/ and 2p/sub 1/2/ hole states are about 10% less than the extrapolated values. 40 refs., 5 figs.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 5598821
- Report Number(s):
- ANL/NDM-91; ON: DE85015234
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELASTIC SCATTERING
ENERGY DEPENDENCE
OPTICAL MODELS
NEUTRON REACTIONS
NIOBIUM 93 TARGET
ANGULAR DISTRIBUTION
DIFFERENTIAL CROSS SECTIONS
EXPERIMENTAL DATA
THEORETICAL DATA
BARYON REACTIONS
CROSS SECTIONS
DATA
DISTRIBUTION
HADRON REACTIONS
INFORMATION
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
SCATTERING
TARGETS
651725* - Nuclear Properties & Reactions
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Experimental- Nuclear Reactions & Scattering- (-1987)
651715 - Nuclear Properties & Reactions
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Theoretical- Nuclear Reactions & Scattering- (-1987)