Quasi-elastic processes in the Si + Pb systems at 5-8 MeV/nucleon

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5062087

Vojtech, R J

Quasielastic yields have been measured for the {sup 28}Si + {sup 208}Pb reaction at E{sub lab} ({sup 28}Si) = 152, 166, and 255 MeV, and for the {sup 30}Si + {sup 208}Pb, {sup 28}Si + {sup 206}Pb, and {sup 30}Si + {sup 206}Pb reactions at E{sub lab} (Si) = 222 MeV. Coupled-channels analysis of the elastic and inelastic scattering has been performed, resulting in the determination of an optical-model potential which describes the data over the range of energies and for different isotopes of Si and Pb. Excellent fits to the data were produced, with one notable exception. An inability to reproduce the angular distribution associated with the inelastic excitation of the 3{sup {minus}} state in {sup 208}Pb was observed in the coupled-channels analysis of {sup 28}Si + {sup 208}Pb at 152 and 166 MeV, in spite of the excellent results obtained at 225 MeV. The hypothesis that this discrepancy reflects a strong coupling of the 3{sup {minus}} state to the neutron transfer channels was unable to be confirmed by coupled-channels calculations into which the one-neutron transfer channel had been approximately included.

• Research Organization: Notre Dame Univ., IN (USA)
• OSTI ID: 5062087
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202* -- Isotope Effects
Isotope Exchange
& Isotope Separation
640300 -- Atomic
Molecular & Chemical Physics
645000 -- High Energy Physics
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
74 ATOMIC AND MOLECULAR PHYSICS
CALCULATION METHODS
DATA
DIRECT REACTIONS
ENERGY RANGE
EXPERIMENTAL DATA
INFORMATION
ISOTOPES
LEAD ISOTOPES
MEASURING INSTRUMENTS
MEASURING METHODS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUMERICAL DATA
QUASI-ELASTIC SCATTERING
QUASI-FREE REACTIONS
SCATTERING
SILICON ISOTOPES