Аннотация:The hydrogen effect on the orientation of Co-60 nuclei in a Pd99Co1 sample is studied. The existence of the combined dipole and electric quadrupolar hyperfine interactions is assumed in the system provided the principal axes of the electric-field gradient (EFG) are randomly distributed with respect to the external magnetic field direction. With the aid of the procedure described in [3] the calculation of the EFC magnitude is performed. The EFG values are found to be equal to 2,6(6).10(19) Vcm-2 and 8,3(8).10(19) Vcm-2 for two investigated samples hydrogenized in a gaseous medium with the pressures of 4 and 2,5.10(4) Pa, respectively. The obtained EFG values may be used for the interpretation of anomalous nuclear effects in the deuterium-solid systems.