[en] The half-lives of low-lying levels of the neutron-rich isotopes ¹⁰²Mo and ¹⁰⁴Mo have been measured at the fission product separator JOSEF with the β-γ-γ triple coincidence technique. Values of t_1/2=126(4) ps and 0.72(4) ns have been obtained for the 2₁⁺ levels at 296 keV and 192 keV in ¹⁰²Mo and ¹⁰⁴Mo, respectively. Deformation parameters of β_q=0.28(1) and 0.31(1), respectively, are deduced, which are smaller than those of the isotones of Sr and Zr. The interacting boson model accounts well for the trend of 2⁺ energies in the Mo isotopes but slightly overpredicts the B(E2) values at saturation. A smooth dependence of τ(2₁⁺) vs. E(2₁⁺) is found for the A∝100 region in agreement with the hydrodynamical model. (orig.)