Elastic scattering of /sup 16/O by /sup 28/Si

Journal Article · Mon Aug 01 04:00:00 EDT 1983 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.28.717· OSTI ID:5517660

Shkolnik, V; Dehnhard, D; Franey, M A

Differential cross sections were measured in small angular steps at forward angles for the elastic scattering of /sup 16/O from /sup 28/Si, /sup 29/Si, and /sup 30/Si at E/sub lab/ = 60 MeV and from /sup 28/Si at six other incident energies between 45 and 63 MeV. The angular position of a peak in the diffraction pattern at theta/sub c.m./approx. =75/sup 0/ was measured as a function of the incident energy between 55 and 63 MeV in 0.5 MeV steps. Close fits to these angular distributions and those of other authors at energies between 41 and 81 MeV, some spanning the whole angular range up to 180/sup 0/, and the excitation functions at 90/sup 0/ and 180/sup 0/, were obtained in an optical model analysis. A consistent description of the data was found by the use of a surface-transparent and parity-dependent potential with a real part able to generate a pocket in the total potential. The real and imaginary strengths depend quite strongly and smoothly on the incident energy. This potential shows a transition from surface transparency to strong absorption as E/sub lab/ approaches 81 MeV. The ambiguities in the strengths of the potential are discussed. The broad dispersive potential resonances which are present in several partial waves at every energy are also discussed and their relative importance is examined.

• Research Organization: J. H. Williams Laboratory of Nuclear Physics, University of Minnesota, Minneapolis, Minnesota 55455
• OSTI ID: 5517660
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 28:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651425* -- Nuclear Properties & Reactions
A=20-38
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELASTIC SCATTERING
ENERGY RANGE
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
FUNCTIONS
HEAVY ION REACTIONS
INFORMATION
MEV RANGE
MEV RANGE 10-100
NUCLEAR REACTIONS
NUMERICAL DATA
OPTICAL MODELS
OXYGEN 16 REACTIONS
PARITY
PARTICLE PROPERTIES
SCATTERING
SILICON 28 TARGET
TARGETS