書誌事項
- タイトル別名
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- Role of Cerium Ions in Preventing the γ-Ray Induced Coloration of Glass
- ガラス ノ ホウシャセン チャクショク ニ タイスル セリウム ノ チャクショク ボウシ キコウ ニ ツイテ
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説明
Glasses containing various amount of trivalent cerium ion (20K2O, 10BaO, 70SiO2, 0.1CeO2, and 0-0.2 Si (mole %)) were first exposed to γ-radiation until they were colored to the same degree, and then, the fading of their color occured with the lapse of time was measured. The content of Ce3+ ion in these glasses was also measured by the spectrophotometric method in order to obtain a relation between its content in the glasses and the fading velocity of their γ-ray induced color. The result showed that the higher the content of Ce3+ ion in the glass is, the higher the fading velocity of its color is.<br>On the basis of this result and the results of the spectrophotometric studies on the cerium-containing glasses so far made by the authors (J. Ceram. Assoc. Japan, 68, 132; 169 (1960)), the authors gave their view on the role of Ce3+ ion in preventing the γ-ray induced coloration of glass: Being excited by γ-ray irradiation, oxygen ions in glass loose some of their electrons. The Ce3+ ions give their weak-bonded 4 f-electrons to the oxygen ions, thus preventing the formation of V-center like defects in glass. At the same time, the Ce3+ ions, now holding positive holes as the result of their lending their 4 f-electrons to the oxygens, catch the ionized electrons that would be trapped or were already trapped by oxygen ion vacancies, thus preventing the formation of F-center like defects in glass. The total function of the Ce3+ ion in glass under γ-ray irradiation is, therefore, the recombination of the positive holes and the ionized electrons, thus preventing the formation of color centers.
収録刊行物
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- 窯業協會誌
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窯業協會誌 70 (797), 143-147, 1962
公益社団法人 日本セラミックス協会
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詳細情報 詳細情報について
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- CRID
- 1390282680224739712
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- NII論文ID
- 110002313840
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- NII書誌ID
- AN00245650
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- ISSN
- 18842127
- 00090255
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- NDL書誌ID
- 9214820
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可