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 quasi-elastic data at Q2 = 2.5, 4.0, 6.0, 8.0 and 10.0 (GeV/c)'. The ratio of elastic cross sections an/up falls with increasing Q2 above 6 (GeV/c)2. Th e inelastic data are compatible either with y-scaling (scattering from a single nucleon) or with [ scaling (scattering from quarks).