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The inclusive polarized structure functions of the proton and deuteron, g1pand g1d, were measured with high statistical precision using polarized 6 GeVelectrons incident on a polarized ammonia target in Hall B at JeffersonLaboratory. Electrons scattered at lab angles between 18 and 45 degrees weredetected using the CEBAF Large Acceptance Spectrometer (CLAS). For the usualDIS kinematics, Q^2>1 GeV^2 and the final-state invariant mass W>2 GeV, theratio of polarized to unpolarized structure functions g1/F1 is found to benearly independent of Q^2 at fixed x. Significant resonant structure isapparent at values of W up to 2.3 GeV. In the framework of perturbative QCD,the high-W results can be used to better constrain the polarization of quarksand gluons in the nucleon, as well as high-twist contributions.

Precision measurements of $g_1$ of the proton and the deuteron with 6 GeV electrons