Elastic and inelastic scattering of 120 MeV 18O from 208Pb and the spin alignment of the 2+ state of 18O

E. E. Gross, J. R. Beene, K. A. Erb, M. P. Fewell, D. Shapira, M. J. Rhoades-Brown, G. R. Satchler, C. E. Thorn

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Abstract

The elastic and inelastic scattering of 18O ions at 120 MeV from a target of 208Pb have been studied. Cross sections for excitation of the 2+ state at 1.982 MeV in 18O and of the 3- state at 2.61 MeV in 208Pb were measured. In addition, the populations of the m-substates for the 18O excitation were deduced from the Doppler-broadened line shapes. The data were subjected to a coupled-channels analysis using either Woods-Saxon or folding-model potentials. In addition, the 18O excitation was found to be described very well by use of a semi-microscopic model. The analyses consistently indicated the presence of a positive static hexadecapole moment of several e · fm4 for the 2+ state of 18O. The m-substate population distributions were found to be better fitted if a vector spin-orbit coupling was introduced for the 2+ state of 18O with a sign opposite to that for the nucleon-nucleus case.

Original languageEnglish
Pages (from-to)362-396
Number of pages35
JournalNuclear Physics A
Volume401
Issue number2
DOIs
StatePublished - 6 Jun 1983
Externally publishedYes

Keywords

  • Nuclear reactions

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