  We investigate three-body recombination rates into deep dimers in cold atomic
gases with large scattering length within hyper-spherical adiabatic zero-range
approach. We derive closed analytic expressions for the rates for one- and
two-species gases. Although the deep dimers are beyond the zero-range theory
the latter can still describe the recombination into deep dimers by use of one
additional short-range absorption parameter. The recombination rate, as
function of the scattering length, retains the known universal behavior --- the
fourth power trend with characteristic log-periodic peaks --- however
increasing the short-range absorption broadens the peaks until they are
eventually completely smeared out. Increasing the heavy-to-light mass ratio in
a two-species system decreases the distance between the peaks and increases the
overal scale of the recombination rate.
