Combined Coulombic and magnetic contributions to dispersion in e + C-12 collisions

Jakubassa-Amundsen, D. H. (2022): Combined Coulombic and magnetic contributions to dispersion in e + C-12 collisions. In: Physical Review C, Vol. 105, No. 5, 54303

Abstract

Dispersion corrections to elastic electron scattering from a C-12 nucleus are calculated within the second-order Born approximation. Three strong transient nuclear excitations are considered, at 4.439 MeV (2(+)), 17.7 MeV (1(-)), and 23.5 MeV (1(-)). The Friar-Rosen-type Coulomb term is supplemented with the transverse part of the photon propagator. It is found that the dispersive cross-section changes in the first diffraction minimum reach nearly 10%, rising more slowly with collision energy beyond 400 MeV. Magnetic scattering can be strong for the individual excited states and lowers the dispersion effect considerably at energies below 400 MeV. However, it contributes at most 10% at the higher energies investigated.

• Item Type: Journal article
• Faculties: Mathematics, Computer Science and Statistics > Mathematics
• Subjects: 500 Science > 510 Mathematics
• ISSN: 2469-9985
• Language: English