Measurement of elastic electron-neutron scattering and inelastic electron-deuteron scattering cross sections at high momentum transfer

We have measured inelastic electron-deuteron, electron-proton, and electron-aluminum cross sections at 10^∘{} in the kinematic region between elastic deuteron scattering and the second resonance region at six beam energies between 9.8 and 21 GeV. The elastic electron-neutron cross section was extracted from the quasielastic data at Q²=2.5,4.0,6.0,8.0, and 10.0 (GeV/c)². The ratio of elastic cross sections σₙσₚ falls with increasing Q² above 6 (GeV/c)². The inelastic data are compatible either with y scaling (scattering from a single nucleon) or with ξ scaling (scattering from quarks).