Relaxation of ion-induced strain in crystalline InP is compared with s
tructural relaxation of amorphous InP. Crystalline InP was bombarded w
ith Se ions at low fluence to produce a damaged surface layer. The roo
m temperature evolution of strain in this layer was determined by high
-resolution x-ray diffraction and compared to the evolution of the def
ect-activated viscosity of amorphous InP during similar room temperatu
re structural relaxation. Both processes can be described by double ex
ponential decay functions with characteristic times of a few hours to
a few days. (C) 1996 American Institute of Physics.