Scattering of polarized and unpolarized nucleons from /sup 28/Si

Journal Article · Sat Oct 01 04:00:00 EDT 1988 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.38.1552· OSTI ID:7064441

Howell, C R; Pedroni, R S; Honore, G M; Murphy, K; Byrd, R C; Tungate, G; Walter, R L

Measurements of the differential cross sections and analyzing powers have been made for /sup 28/Si(n,n/sub 0/) and /sup 28/Si(n,n/sub 1/) for incident neutron energies between 8 and 17 MeV. These data have been combined with previous differential and total cross-section data to obtain the most complete data set for neutron scattering from /sup 28/Si over the 8--40 MeV energy range. The data have been described within the framework of a symmetric rotational model using phenomenological coupled-channels calculations. Nuclear moments were deduced and they are in good agreement with those obtained from electron scattering and Coulomb excitation measurements. Various calculations were performed to determine the sensitivity of the data and calculations to the signs of the potential deformation parameters ..beta../sub 2/ and ..beta../sub 4/. The systematic analysis of the analyzing power data enabled the determination of the deformation length for the spin-orbit potential. Comparisons between neutron- and proton-scattering data and calculations were made to test the sensitivity of this type of data to charge symmetry breaking in the nuclear force and to investigate the isospin dependence of the absorptive part of the nucleon-nucleus scattering potential for /sup 28/Si. The results of these comparisons suggest that the differences between /sup 28/Si+n and /sup 28/Si+p scattering can be attributed solely to Coulomb effects.

• Research Organization: Department of Physics, Duke University, Durham, North Carolina 27706
• OSTI ID: 7064441
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 38:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651420* -- Nuclear Properties & Reactions
A=20-38
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYZING POWER
BARYON REACTIONS
CHARGE DISTRIBUTION
COULOMB EXCITATION
COUPLED CHANNEL THEORY
CROSS SECTIONS
DATA
DEFORMATION
DIFFERENTIAL CROSS SECTIONS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXPERIMENTAL DATA
HADRON REACTIONS
INELASTIC SCATTERING
INFORMATION
ISOSPIN
MEV RANGE
MEV RANGE 01-10
MEV RANGE 10-100
NEUTRON REACTIONS
NUCLEAR DEFORMATION
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
PARTICLE PROPERTIES
SCATTERING
SILICON 28 TARGET
SYMMETRY BREAKING
TARGETS
TOTAL CROSS SECTIONS