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http://hdl.handle.net/2445/213224
Title: | Dispersion effects in elastic electron scattering from 208Pb |
Author: | Jakubassa-Amundsen, D. H. Roca Maza, Xavier |
Keywords: | Interaccions electró-positró Leptons (Física nuclear) Electron-positron interactions Leptons (Nuclear physics) |
Issue Date: | 25-Jul-2023 |
Publisher: | American Physical Society |
Abstract: | Dispersion corrections to elastic electron scattering from 208Pb at energies up to 150 MeV are estimated within the second-order Born approximation. All strong transient nuclear excited states with angular momentum up to 𝐿=3 and natural parity are taken into consideration. It is found that at small scattering angles the high-lying 𝐿=1 isovector states provide the dominant contribution to the dispersive change of the differential cross section and of the beam-normal spin asymmetry. At the back-most angles these changes are considerably smaller and are basically due to the isoscalar 𝐿=2 and, to a lesser extent, 𝐿=3 states. In comparison with the findings for 12C, the dispersive cross-section modifications for 208Pb are significantly larger, while the spin-asymmetry changes are much smaller at all angles. The latter originates from the destructive interference of the multipole contributions in 208Pb that switch sign when proceeding from 𝐿 to 𝐿+1. This mechanism might be the origin of the small beam-normal spin asymmetries recently measured in 208Pb at much larger energies. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevC.108.034314 |
It is part of: | Physical Review C, 2023, num.108 |
URI: | http://hdl.handle.net/2445/213224 |
Related resource: | https://doi.org/10.1103/PhysRevC.108.034314 |
ISSN: | 2469-9985 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
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