X-ray absorption fine structure (XAFS) spectroscopy has been measured
at glancing angles of incidence on 5x10(19) gallium atoms cm-3 ion-imp
lanted in amorphous silicon. The effects of preparation (ion-damaged o
r rf glow-discharge) of amorphous silicon are discussed. In particular
, heat treatment has been investigated to examine the local structure
of the dopants at various stages of annealing and recrystallisation.