The ratio of gluon distributions in Sn and C

We calculate the ratio of gluon densities, GSn(x)GC(x), for 0.01 < x < 0.1, from the new high statistics data on F2SnF2C taken by the NM Collaboration. For small x, the shadowing in the gluon distribution is about equal to the shadowing of quark distribution. The antishadowing in the gluon distribution, however, is roughly 10%. We also compare with the difference of ratios R = σLσT from Sn and C.