Propagation of 29-cm-1 phonons in ruby under conditions of resonant scattering, and estimate of their lifetimes
Abramov A.P., Abramova I.N., Gerlovin I.Ya., Razumova I.K.
It is demonstrated experimentally that there is no "bottleneck" effect in experiments on optical detection of 29-cm"1 phonons in ruby. It is concluded that at 2 К the lifetime of the 29-cm~J phonons exceeds 2.7 usee.