EXAFS STUDIES OF PHOTOSTRUCTURAL CHANGES IN CHALCOGENIDE GLASSES S.R. ELLIOTT, G.N. GREAVES, A.J. LOWE, L.F. GLADDEN and J.H.S. RENNIE J. Phys. Colloques, 47 C8 (1986) C8-363-C8-368 DOI: 10.1051/jphyscol:1986871