Double di8'erential cross sections for inelastic electron scattering from He have been measured at bombarding energies between 279 and 725 MeV. The longitudinal and transverse response functions were obtained for constant momentum transfer between 300 and 500 MeV/c. Plane-wave impulse approximation calculations overestimate the longitudinal response and produce fair agreement with the transverse part. The Coulomb sum is determined and compared with exact calculations. Within the experimental error the data exhaust the sum rule; this provides a 6rst measurement of ground-state correlations.

Longitudinal response functions for 3 H and 3 He have been obtained from inclusive electron scattering cross sections, for 200 <

The 3 H and 3 He charge and magnetic form factors have been extracted from cross-section measurements in the region 0.3;$ (2 ^2.9 fm -1 . The measurements have random uncertainties of about 2% and systematic uncertainties of about 2% for 3 H and 1.5% for 3 He. The small systematic uncertainties allow accurate determination of the isoscalar and isovector trinucleon form factors. The isoscalar charge and isovector magnetic form factors are in reasonable agreement with current theoretical models, whereas the isovector charge and isoscalar magnetic form factors show significant deviations from the models.

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Li NMR is observed with 'LieI in D 20 using a Nicolet NT-360 NMR Spectrometer over a 3.5 month period. The linewidth is typically about 40 mHz. Fitting to a triple Lorentzian line shape gives the splitting df $ 2.2 mHz which is roughly 20 times better than previous experiments. This result puts a limit on mass anisotropy d m / m and the nonuniversality IHi} -gil