Evidence for parity dependence in the neutron- sup 40 Ar optical model potential

Journal Article · Thu Aug 01 04:00:00 EDT 1991 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.44.657· OSTI ID:5308656

Johnson, C H ^[1]; Carlton, R F ^[2]; Winters, R R ^[3]

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1. Oak Ridge National Laboratory, Oak Ridge, Tennessee (USA)
2. Middle Tennessee State University, Murfreesboro, Tennessee (USA)
3. Denison University, Granville, Ohio (USA)

The neutron dispersive optical model potential that was developed previously from an analysis of extensive data on the neutron-{sup 40}Ca system is adapted to the neutron-{sup 40}Ar system by adjusting the central depth of the local equivalent of the Hartree-Fock-type potential. The {ital n}-{sup 40}Ar data for this adjustment are the total cross section for 11{lt}{ital E}{lt}40 MeV and the centroid energy for the observed single-particle and single-hole states of the valence shells. The resulting potential for {ital n}-{sup 40}Ar yields good predictions for the particle-hole gap for the valence shells and for the energy-averaged {ital s}-wave and {ital p}-wave scattering functions in the resonance region. However, it gives a poor prediction for the total cross section from 2 to 11 MeV. A similar discrepancy was observed earlier for {sup 40}Ca. A parity dependence in the surface imaginary potential is suggested from a more careful examination of the {ital s}-wave and {ital p}-wave scattering functions for {sup 40}Ar; that parity dependence gives a good prediction of the total cross section for 2 to 11 MeV.

• OSTI ID: 5308656
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 44:2; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653001 -- Nuclear Theory-- Nuclear Structure
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANALYZING POWER
ARGON 40 TARGET
BARYON REACTIONS
CALCIUM 40
CALCIUM ISOTOPES
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISPERSION RELATIONS
EVEN-EVEN NUCLEI
FUNCTIONS
HADRON REACTIONS
HARTREE-FOCK METHOD
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
NEUTRON REACTIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
OPTICAL MODELS
P WAVES
PARITY
PARTIAL WAVES
PARTICLE PROPERTIES
PARTICLE-HOLE MODEL
S WAVES
SCATTERING
SPECTRAL FUNCTIONS
SPECTROSCOPIC FACTORS
STABLE ISOTOPES
TARGETS
TOTAL CROSS SECTIONS
VALENCE