  A rather simple method is used to detect at once both optical absorption
spectra and excited-states nonradiative transitions in 0,03 at ${%}$ and 0,16
at ${%}$ ruby at temperature 2 K. The technique utilizes a time-resolved
bolometer detection of phonons, generated by the excited-state nonradiative
relaxation following optical excitation with a pulsed tunable dye laser. The
observed excitation spectra of phonons well coincide with already known
absorption spectra of both single chromium ions and pairs of the nearest
neighbors. For the first time the fast ($\leqslant 0,5 {\mu}s$)resonant energy
transfer from single chromium ions to the fourth- nearest neighbors is observed
directly. The new strongly perturbed $Cr$-single-ion sites are observed.
