Coupled-channel calculations of electron scattering by samarium
- 1 November 1974
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 10 (5), 2002-2014
- https://doi.org/10.1103/physrevc.10.2002
Abstract
The coupled-channel method is considered in the context of relativistic hadron or lepton scattering by nonspherical dynamical nuclei. The program Zenith, which calculates electron-nucleus scattering via Coulomb and magnetic multipole potentials, is described and is applied in particular to the deformed samarium isotopes and . Two- and three-level calculations for the ground state 0+ and the excited states 2+ and 4+ containing all relevant Coulomb potentials are described. The elastic dispersion effect, arising mainly from coupling with the 2+ first excited state, and the dispersive effect on the 0+ → 2+ inelastic cross section, coming mainly from the diagonal scattering in the excited state, are appreciable at 105 MeV, the highest energy at which measurements have been made. The largest effect, however, is that on the 0+ → 4+ inelastic cross section arising from the sequential excitation 0+ → 2+ → 4+ via the potential. It has interesting small-angle behavior and becomes greater than 20% at the largest measured angles at 105 MeV. The dependence of some of these effects on energy and is explored up to 250 MeV and 2 .
Keywords
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