It was found experimentally that the resonant energy transfer and Penning process have relatively larger reaction cros ssections in HgBr + N2 and HgX2(X = Cl, Br, l)+Ar mixtures respectively. The stimulated cross sections, saturation intensities and oscillation thresholds of these transitions were calculated from experimental data. The possibility for CW operation of HgX2/HgX(B-X)lasers is also discussed.