PHOTON-ECHO STUDY OF ULTRAFAST DEPHASING IN AMORPHOUS SOLIDS IN WIDE TEMPERATURE REGION WITH INCOHERENT LIGHT N.V. GRUZDEV, E.G. SIL'KIS, V.D. TITOV and Yu.G. VAINER J. Phys. IV France, 01 C7 (1991) C7-439-C7-442 DOI: 10.1051/jp4:19917117