Proton and Neutron Spin Structure Functions in and near the Resonance Region

Abstract

We present an overview of the measurements for polarized electron scattering from polarized NH3, ND3, and 3He targets at JLab. All three experimental halls are involved in this program. The data span a range in Q2 up to about 3.5 GeV2 and a range in the γ*N invariant mass W up to 3.5 GeV. The photon absorption function A1 and the spin structure function g1 for the proton and deuteron have been extracted from data obtained with the CLAS spectrometer. The photon absorption functions, A1 and A2, and the spin structure functions g1 and g2 for 3He have been obtained from Hall A data.