Measurement of the Proton and Deuteron Spin Structure Function g_1 in the Resonance Region

The E143 Collaboration

We have measured the proton and deuteron spin structure functions g_1^p and g_1^d in the region of the nucleon resonances for W^2 < 5 GeV^2 and $Q^2\simeq 0.5$ and $Q^2\simeq 1.2$…