Dispersion of dynamic modules of elasticity of simple liquids for different types of decay of flow relaxations

► It is obtained analytical expressions for K(ω) and μ(ω). ► Numerical calculations are carried out in a wide range of frequencies, temperatures and density for liquids Ar, Kr and Xe. ► It is shown that the frequency intervals for the diffusional mechanism of Kr(ν), μ(ν) are wide (~ 105 Hz) and for the exponential decay these areas are narrow (~ 102 Hz).