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Raman Spectroscopy for Quantitative Analysis of Point Defects and Defect Clusters in Irradiated Graphite
http://hdl.handle.net/10132/3779
http://hdl.handle.net/10132/37792d0a67dc-a204-49b8-b1d8-67428a44947a
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
niwase_2012.pdf (4.7 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2012-02-10 | |||||
| タイトル | ||||||
| タイトル | Raman Spectroscopy for Quantitative Analysis of Point Defects and Defect Clusters in Irradiated Graphite | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Niwase, Keisuke
× Niwase, Keisuke |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We report the development of Raman spectroscopy as a powerful tool for quantitative analysis of point defect and defect clusters in irradiated graphite. Highly oriented pyrolytic graphite (HOPG) was irradiated by 25 keV He+ and 20 keV D+ ions. Raman spectroscopy and transmission electron microscopy revealed a transformation of irradiated graphite into amorphous state. Annealing experiment indicated a close relation between Raman intensity ratio and vacancy concentration. The change of Raman spectra under irradiation was empirically analyzed by “disordered-region model,” which assumes the transformation from vacancy-contained region to disordered region. The model well explains the change of Raman spectra and predicts the critical dose of amorphization, but the nature of the disordered region is unclear. Then, we advanced the model into “dislocation accumulation model,” assigning the disordered region to dislocation dipole. Dislocation accumulation model can simulate the irradiation time dependencies of Raman intensity ratio and the c-axis expansion under irradiation, giving a relation between the absolute concentration of vacancy and Raman intensity ratio, suggesting an existence of the barrier on the mutual annihilation of vacancy and interstitial. | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Copyright © 2012 Keisuke Niwase. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. | |||||
| 書誌情報 |
International Journal of Spectroscopy 巻 2012, p. 1-14, 発行日 2012 |
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| DOI | ||||||
| 関連タイプ | isIdenticalTo | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1155/2012/197609 | |||||
| フォーマット | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | application/pdf | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| 出版者 | ||||||
| 出版者 | Hindawi Publishing Corporation | |||||
| 資源タイプ | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Article | |||||
| 関係URI | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://www.hindawi.com/journals/ijs/2012/197609/ | |||||
| 関連名称 | http://www.hindawi.com/journals/ijs/2012/197609/ | |||||
