The neutron longitudinal and transverse asymmetries A n 1 and A n 2 have been extracted from deep inelastic scattering of polarized electrons by a polarized 3 He target at incident energies of 19.42, 22.66 and 25.51 GeV. The measurement allows for the determination of the neutron spin structure functions g n 1 (x; Q 2 ) and g n 2 (x; Q 2 ) over the range 0:03 < x < 0:6 at an average Q 2 of 2 (GeV=c) 2 . The data are used for the evaluation of the Ellis-Ja e and Bjorken sum rules. The neutron spin structure function g n 1 (x; Q 2 ) is small and negative within the range of our measurement, yielding an integral R 0:6 0:03 g n 1 (x)dx = 0:028 0:006 (stat) 0:006 (syst). Assuming Regge behavior at low x, we extract n 1 =

The spin structure function of the neutron gr has been determined over the range 0.03 < x < 0.6 at an average Q2 of 2 (GeV/c)2 by measuring the asymmetry in deep inelastic scattering of polarized electrons from a polarized 3He target at energies between 19 and 26 GeV. The integral of the neutron spin structure function is fo. nd to be Ji g?(x) dx =-0.022 f 0.011. Earlier reported proton results 2. .- .-_together with the Bjorken sum rule predict &r g?(x) dx =-0.059 f 0.019.

Inclusive electron-scattering measurements of A electroexcitation in nuclei are reported. Electrons with energies of 0.96, 1.1, 1.3, and 1.5 GeV were scattered from ^H, "^He, C, Fe, and W at 37.5°, corresponding to g^ =0.20-0.52 (GeV/c)^ at the A peak. The centroid of the A-region cross-section peak is above that for the free nucleon and it shifts to higher invariant mass as g^ increases. The A dependence in the dip region and ratios of nuclear to nucleon integrated cross sections indicate that at these Q^ values there is little specifically nuclear, e.g., quasideuteron, background contribution.

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Deep-inelastic electron scattering from 40 Ca, 48 Ca, and 56 Fe has been measured at 60°, 90°, and 140° and at inelasticities up to and including the A (3, 3) region. Longitudinal response functions in the momentum interval 300 MeV/c < |q| < 600 MeV/c were extracted. The experimental Coulomb sum rule is observed between the two calcium isotopes.