Cross sections and analyzing powers for elastic and inelastic neutron scattering from /sup 58/Ni, /sup 60/Ni, /sup 116/Sn, and /sup 120/Sn

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1982

OSTI ID:5005070

Guss, P P

Recent developments have enabled the efficient accumulation of data involving pulsed polarized beams. Partially to test the power of this new facility, high precision analyzing-power data for the /sup 2/H vector(d,n)/sup 3/He reaction at deuteron energies of 5.5 ,7.0, 8.5, and 10.0, and 11.5 MeV have been acquired and the results of these tests are given here. The neutron scatterng differential cross sections and analyzing powers have been measured for /sup 58/Ni, /sup 60/Ni, and /sup 116/Sn, /sup 120/Sn at several energies in the energy region 8-17 MeV. These data have been analyzed using coupled channels models, employed the SPRT method of analysis. The quadrupole deformaton parameters have been deduced for both the present (n,n') and prior (p,p') measurements. These deformation parameters are shown to coincide with the interpretation by Madsen and Brown of core polarization phenomena. Further, the A/sub y/(theta) data for the present (n,n') measurements are instrumental in determining the nature of the spin-orbit interaction, providing heretofore unrealized insights into the nuclear structure of proton-closed-shell nuclei. Not only is it seen that the full Thomas form of the deformed spin-orbit potential is required to describe the data, but it is shown that simple isospin-symmetric arguments which explain the proton scattering by neutron-closed-shell nuclei are not sufficient to explain the data presented here. Complete spherical optical model analyses have also been performed for the present elastic scattering data. The results of these analyses are seen to be consistent with data previously reported for these elements in their natural abundances. The spherical optical model analyses for nickel and tin have been combined and extended to obtain a global spherical optical model for neutron scattering which is representative of a far broader mass and energy range than that of the present experiment.

• Research Organization: Duke Univ., Durham, NC (USA)
• OSTI ID: 5005070
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYZING POWER
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
COUPLED CHANNEL THEORY
COUPLING
CROSS SECTIONS
DATA
DEFORMATION
DEUTERIUM TARGET
DEUTERON REACTIONS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ENERGY RANGE
EXPERIMENTAL DATA
HADRON REACTIONS
INELASTIC SCATTERING
INFORMATION
INTERMEDIATE COUPLING
L-S COUPLING
MEV RANGE
MEV RANGE 01-10
MEV RANGE 10-100
NEUTRON REACTIONS
NICKEL 58 TARGET
NICKEL 60 TARGET
NUCLEAR DEFORMATION
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
OPTICAL MODELS
SCATTERING
TARGETS
TIN 116 TARGET
TIN 120 TARGET