TY - GEN AU - Hanan Fawzy Ali Omar Sharaf Eldin AU - Mohamed Mahmoud Elokr , AU - Mohy Saad Mansour , AU - Yahia Abdelhamid Badr , TI - Effect of additives and irradiation on the formation of color center in some glasses / PY - 2008/// CY - Cairo : PB - Hanan Fawzy Ali Omar Sharaf Eldin , KW - Borate glanes KW - Color center KW - Rare earth N1 - Thesis (M.Sc.) - Cairo University - National Institute Of Laser Enhanced Science - Department Of Laser Sciences and Interactions; Issued also as CD N2 - The last three decades have seen a revolution in luminescence technology driven by the use of rare - earth - activated materials in a variety of ptactical applications.This has led to rare - earth materials becoming an essential component in today's solid - state lasers , fluorescent lights , and information displays ER -