In order to identify double-gamma vibrational states in well deformed
and transitional region, we have made Coulomb excitation experiments f
or Er-168 and Os-192. The measured E2 transition probabilities support
the assignment of the 2055-keV 4+ state in Er-168, the 1069-keV 4+ an
d 956-keV 0+ states in Os-192 as the double-gamma vibrational states.