caa a22 4500 388022981 CHVBK 20180307124929.0 cr unu---uuuuu 161130e199805 xx s 000 0 eng 10.1557/JMR.1998.0159 doi S088429140004396X pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0159 A study of optical absorption and photoinduced effects in Ge-Se-Te amorphous system [Elektronische Daten] Optical studies have been performed on amorphous films of the system Ge10Se90-xTex where (x = 20, 30, 40). The study revealed that as the Te content is increased, the optical band gap (Eg) was found to decrease. Photoinduced effects were studied on thin films samples irradiated with either white light or uv light. The shift in Eg due to photoirradiation disappears upon annealing the films at a temperature below the glass transition temperature. The effect of γ-radiation up to 8 kGy on the optical band gap was also investigated, and no detectable shift of the optical band gap was observed. The relationship between the optical band gap and both the average heat of atomization and the average coordination number of the compositions under investigation was studied. Copyright © Materials Research Society 1998 Maged A. F. National Center for Radiation Research and Technology, P.O. Box 29, Nasr City, Cairo, Egypt Sanad A. M. Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt El-Fouly M. F. National Center for Radiation Research and Technology, P.O. Box 29, Nasr City, Cairo, Egypt Amin G. A. M. National Center for Radiation Research and Technology, P.O. Box 29, Nasr City, Cairo, Egypt Journal of Materials Research Cambridge University Press 13/5(1998-05), 1128-1131 0884-2914 13:5<1128 1998 13 JMR https://doi.org/10.1557/JMR.1998.0159 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0159 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Maged A. F. National Center for Radiation Research and Technology, P.O. Box 29, Nasr City, Cairo, Egypt NATIONALLICENCE 700 1- Sanad A. M. Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt NATIONALLICENCE 700 1- El-Fouly M. F. National Center for Radiation Research and Technology, P.O. Box 29, Nasr City, Cairo, Egypt NATIONALLICENCE 700 1- Amin G. A. M. National Center for Radiation Research and Technology, P.O. Box 29, Nasr City, Cairo, Egypt NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/5(1998-05), 1128-1131 0884-2914 13:5<1128 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge