Abstract
Deep-inelastic electron scattering from $^{40}\mathrm{Ca}$, $^{48}\mathrm{Ca}$, and $^{56}\mathrm{Fe}$ has been measured at 60\ifmmode^\circ\else\textdegree\fi{}, 90\ifmmode^\circ\else\textdegree\fi{}, and 140\ifmmode^\circ\else\textdegree\fi{} and at inelasticities up to and including the $\ensuremath{\Delta}(3,3)$ region. Longitudinal response functions in the momentum interval $300 \mathrm{MeV}/c<|\stackrel{\ensuremath{\rightarrow}}{\mathrm{q}}|<600 \mathrm{MeV}/c$ were extracted. The experimental Coulomb sum rule is observed between the two calcium isotopes.
Published Version
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