Elastic and Inelastic Electron Scattering fromMn55

Abstract

Elastic and inelastic electron scattering from ${\mathrm{Mn}}^{55}$ has been studied for incident electron energies between 25 and 60 MeV and scattering angles in the range 69°-149°. A partial-wave analysis of the elastic scattering data yielded a ground-state rms radius equal to 3.68±0.11 F, in good agreement with the muonic x-ray result. From inelastic scattering which covered excitation energies up to 3.5 MeV, reduced radiative-transition probabilities for excitations to levels at 0.98, 1.53, 1.88, 2.29, and 3.05 MeV have been deduced by a distorted-wave analysis. The transition probabilities are compared to those obtained from heavy-particle scattering and $\gamma$ resonance fluorescence.