The quadrupole interaction of the 11^- and 12⁺ isomers in ^192,194Pb nuclei has been investigated in the electric field gradient of metallic Bi polycrystalline lattice by the method of time-differential observation of the \gamma -rays perturbed angular distribution. The electric field gradient strength of the host Bi lattice has been calibrated by using as probe the 12⁺ isomer in ¹⁹⁴Pb. The intrinsic quadrupole moments derived for the 11^- isomers described by the \pi (1h_9/21i_13/2) intruder configuration are compared with the predictions of mean-field and interacting boson models.

PACS numbers: 21.10.Ky, 21.60.Cs, 21.60.Ev, 27.80.+w