The nuclear effects in g13He and the Bjorken sum rule for A = 3

The Bjorken sum rules for the A = 3 and A = 1 are used as a guide to estimate nuclear effects in extracting g1n(x, Q2) from the e3He data. We estimate that the combination of the spin depolarization, the nonnucleonic degrees of freedom in the A = 3 system and nuclear shadowing is likely to reduce g13He(x ≤ 0.05) by ∼ 15% while a significant enhancement of the structure functions g13He, g13H at x ∼ 0.1 is predicted.