The probabilities of the radiative transitions ν′1(³ P ₁)-ν″0(¹ S ₁) and the radiative lifetimes of the resonant ν′1(³ P ₁) states of the CdAr molecules as functions of the vibrational excitation degree were calculated using the effective Hamiltonian method and the semiempirical method of quasi-molecular term analysis.