Fast-neutron interaction with elemental zirconium, and the dispersive optical model

Journal Article · Sun Mar 01 00:00:00 EST 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.45.1260· OSTI ID:7234799

Chiba, S; Guenther, P T; Smith, A B; Sugimoto, M; Lawson, R D ^[1]

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1. Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)

Differential neutron elastic- and inelastic-scattering cross sections of elemental zirconium were measured from {approx}1.5 to 10 MeV. Below 3 MeV the measurements were made at incident-neutron energy intervals of {approx}100 keV, from 3 to 4 MeV in steps of {approx}200 keV, and in {approx}500 keV increments at higher energies. The angular range of the measurements is {approx}18{degree} to 160{degree}, with up to more than 100 differential values per distribution. This comprehensive database, augmented with a 24 MeV elastic-scattering distribution from the literature, is used to develop two phenomenological optical-statistical models, both of which describe the data very well. First, the parameters of the conventional spherical optical model (SOM) are deduced. Second, the model in which the dispersion relationship, linking real and imaginary interactions (DOM), is considered. The SOM parameters are consistent with systematics previously reported from this laboratory, and the volume integral per nucleon of the real potential strength, {ital J}{sub {ital V}}, and the radius, {ital r}{sub {ital V}}, are energy dependent. Although the energy dependence of {ital J}{sub {ital V}} is reduced by about 30% in going from the SOM to the DOM, there is little change in the {ital E} variation of {ital r}{sub {ital V}} between the two models. Both models are extrapolated to the bound-state regime where they have modest success in predicting the binding energies of the single-particle and single-hole states in {sup 90}Zr.

• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 7234799
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 45:3; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
NEUTRON REACTIONS
ELASTIC SCATTERING
INELASTIC SCATTERING
ZIRCONIUM 90 TARGET
ANGULAR DISTRIBUTION
BINDING ENERGY
DIFFERENTIAL CROSS SECTIONS
MEV RANGE 01-10
OPTICAL MODELS
STATISTICAL MODELS
BARYON REACTIONS
CROSS SECTIONS
DISTRIBUTION
ENERGY
ENERGY RANGE
HADRON REACTIONS
MATHEMATICAL MODELS
MEV RANGE
NUCLEAR REACTIONS
NUCLEON REACTIONS
SCATTERING
TARGETS
663430* - Nucleon-Induced Reactions & Scattering- (1992-)
663300 - Nuclear Reactions & Scattering
General- (1992-)
663560 - Nuclear Mass Ranges- A=90-149- (1992-)