Reversed photon echo study of relaxation processes in ruby in a zero magnetic field

Magnetic field- and concentration-dependent photon echo relaxation in ruby with simple exponential decay

The effect of instantaneous diffusion on the relaxation of photon echoes in ruby

Photon-echo study of the cross-relaxation kinetics of ground states in ruby

Photon Echoes and Their Application to Relaxation Measurements in Ruby.

Characteristics of reversed photon echo resulting from nonsimultaneous four-wave interaction in ruby

Relaxation of Photon Echoes in Ruby.