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題名 | Absorption Spectra of Gamma-Irradiated Borate Glasses Containing Vanadium=含釩之硼酸鹽玻璃經加馬射線照射後之吸收光譜 |
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作者 | Elbatal,Hatem A.; Shafi,Nabil Abd El; Azooz,Moenis A.; | 書刊名 | 核子科學 |
卷期 | 35:5 1998.10[民87.10] |
頁次 | 頁331-342 |
分類號 | 449.6 |
關鍵詞 | 釩; 硼酸鹽玻璃; 加馬射線; 吸收光譜; Absorption; Radiation; Borate glasses; Vanadium; |
語文 | 英文(English) |
英文摘要 | The optical absorption spectra of nominally pure and V-doped alkali borate glasses have been measured at wavelengths from 200 to 1100 nm before and after absorbed various doses of γ - ray radiation. Based on the analysis, the effect of glass composition on the equilibrium between various vanadium coordinations was studied. In the parent borate glass without vanadium, the gamma ray irradiation induces three absorption bands that are attributed to the formation of positive hole centers, in the glasses containing vanadium, it induces two new absorption bands. The results indicate that the electrons liberated during irradiation share in the formation of V ���� ions according to the proposed photochemical reactions. Another postulation is advanced that the induced defects is a metastable (���� +e �� ) defect which gives absorption at the same position to that for the original V ���� ions. The change in the growth rate of the induced bands is discussed. |
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