Scattering of polarized fast neutrons from /sup 9/Be, /sup 54/Fe, /sup 65/Cu, and /sup 208/Pb: the determination of the nucleon-nucleus spin-orbit interaction
In order to investigate the spin-dependence of the nucleon-nucleus interaction, a new facility has been developed to measure analyzing powers for the scattering of polarized neutrons. This new facility, incorporating an efficient pulsing system for polarized ion beams, allows accurate neutron analyzing power data to be acquired in a reasonable length of accelerator time. Results are reported here for neutron scattering from the ground and first 5/2/sup -/ (2.4 MeV) excited states in /sup 9/Be at 9, 10, 11, 13, and 15 MeV incident neutron energies, the ground state in /sup 54/Fe, /sup 65/Cu, and /sup 208/Pb at 10 and 14 MeV, the first 2/sup +/ (1.4 MeV) state in /sup 54/Fe at 10 MeV, and the combined first 3/sup -/ (2.6 MeV) and 5/sup -/ (3.2 MeV) states in /sup 208/Pb at 10 MeV. Cross-section data were obtained at 10, 14, and 17 MeV for scattering from the ground state of /sup 208/Pb. At 10 MeV, cross-section data were obtained for scattering from the combined 3/sup -/ + 5/sup -/ states in /sup 208/Pb. Elastic scattering measurements have been parameterized in the framework of the spherical optical model. With the exception of the /sup 208/Pb forward angle data, the A/sub y/(theta) for elastic scattering are reasonably well described by the spherical optical model. Our parameterization of the spin-orbit term in the optical model for neutron scattering is consistant with that obtained recently for proton scattering. Inelastic scattering measurements have been investigated using the coupled channels formalism. A deformation of the spin-orbit term in the coupled channels model has been determined.
- Research Organization:
- Duke Univ., Durham, NC (USA)
- OSTI ID:
- 6259517
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Cross sections and analyzing power in the 8- to 17-MeV range for neutron scattering from /sup 54,56/Fe, /sup 58,60/Ni, /sup 93/Nb, and /sup 120/Sn
Measurement of A sub y (. theta. ) for n + sup 208 Pb from 6 to 10 MeV and the neutron-nucleus interaction over the energy range from bound states at minus 17 MeV up to scattering at 40 MeV
Related Subjects
BERYLLIUM 9 TARGET
NEUTRON REACTIONS
COPPER 65 TARGET
IRON 54 TARGET
LEAD 208 TARGET
SCATTERING
ANALYZING POWER
COUPLED CHANNEL THEORY
CROSS SECTIONS
EXPERIMENTAL DATA
L-S COUPLING
MEV RANGE 01-10
MEV RANGE 10-100
OPTICAL MODELS
POLARIZED BEAMS
BARYON REACTIONS
BEAMS
COUPLING
DATA
ENERGY RANGE
HADRON REACTIONS
INFORMATION
INTERMEDIATE COUPLING
MEV RANGE
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
TARGETS
651325* - Nuclear Properties & Reactions
A=6-19
Experimental- Nuclear Reactions & Scattering- (-1987)
651525 - Nuclear Properties & Reactions
A=39-58
Experimental- Nuclear Reactions & Scattering- (-1987)
651625 - Nuclear Properties & Reactions
A=59-89
Experimental- Nuclear Reactions & Scattering- (-1987)
651925 - Nuclear Properties & Reactions
A=190-219
Experimental- Nuclear Reactions & Scattering- (-1987)