C2contributions to back-angle inelastic electron scattering fromEr166andTa181

Abstract

We present results of distorted-wave Born approximation calculations of longitudinal contributions to 180\ifmmode^\circ\else\textdegree\fi{} inelastic electron scattering, in the limit of zero electron mass and pure Coulomb distortion. A rough estimate of said contributions is given for the transitions ${0}^{+}$\ensuremath{\rightarrow}${2}^{+}$ in $^{166}\mathrm{Er}$, and ${\frac{7}{2}}^{+}\ensuremath{\rightarrow}{\frac{9}{2}}^{+}$ and ${\frac{11}{2}}^{+}$ in $^{181}\mathrm{Ta}$. Results are compared to plane-wave Born approximation calculations of transverse form factors.