SILVER IN PHOTODOPED ARSENIC SULFIDE FILMS : AN EXAFS STUDY A.T. STEEL, A.P. FIRTH, A.E. OWEN, P. EWEN et G.N. GREAVES J. Phys. Colloques, 47 C8 (1986) C8-395-C8-398 DOI: 10.1051/jphyscol:1986878