In nanostructures of doped alkali halides, unrelaxed K-centres produce
d in the exciton decay are able to escape from the surface thus produc
ing in the grains of polycrystalline film an excess concentration of F
-centres, which has a great tendency to form an interacting F-centre c
hain or a canal. Role of this F-centre chain in photostimulable energy
transfer is analysed. It is concluded that specific interaction of un
relaxed H-centres and electrons with the F-centre chain (or the canal)
leads to the temperature-independent exciton or electron transport at
any distance. Hence, the temperature-independent photostimulated lumi
nescence (PSL) response production and retrieval are experimentally ob
served. (C) 1998 Published by Elsevier Science B.V. All rights reserve
d.