Spin response to backward ( e, e') scattering from heavy deformed nuclei
Abstract
The M1 and E2 responses of spin 1 + excitations to ( e, e') scattering from heavy deformed nuclei are studied in QRPA and DWBA on the example of 158Gd. The transverse response originates mainly from the magnetization currents. The transverse E2 dominates over the longitudinal C2 response for θ ⩾ 165°. The joint response of the whole spin-flip region (6-11 MeV) for θ ⩾ 165° is characterized by the M1 over E2 dominance for transferred momentum ϱeff < 0.6 fm -1 (or incident electron energy Ei < 40 MeV). Above these values the E2 response provides substantial contributions to the summed ( e, e') cross section. They are larger in the lower spin-flip region (6-8 MeV) due to the larger orbital (convection) contributions at lower excitation energy.
- Publication:
-
Nuclear Physics A
- Pub Date:
- February 1997
- DOI:
- 10.1016/S0375-9474(96)00422-8
- Bibcode:
- 1997NuPhA.613...25N