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Positron Annihilation in Neutron- and Electron-Irradiated Silica Glass
https://doi.org/10.50974/00043610
https://doi.org/10.50974/00043610d4325776-2a0c-4182-95e2-fb27b5b16907
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
KJ00004200599.pdf (784.4 kB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-05-02 | |||||
| タイトル | ||||||
| タイトル | Positron Annihilation in Neutron- and Electron-Irradiated Silica Glass | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Positron Annihilation | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Positronium | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Silica Glass | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Irradiation Effects | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Voids | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Defects | |||||
| 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 | departmental bulletin paper | |||||
| ID登録 | ||||||
| ID登録 | 10.50974/00043610 | |||||
| ID登録タイプ | JaLC | |||||
| 著者 |
HASEGAWA, Masayuki
× HASEGAWA, Masayuki× TABATA, Makoto× MIYAMOTO, Tetsushi× FUJINAMI, Masanori× SUNAGA, Hiromi× OKADA, Sohei× YAMAGUCHI, Sadae |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Positron lifetime and angular correlation of annihilation radiation (ACAR) have been measured on fused and synthetic silica glass before and after irradiation with fast-neutrons up to 8x10^<18> n/cm^2 below 150℃ or with 3 MeV electrons up to 1x10^<18>e/cm^2 below 50℃. Before irradiation positron lifetime spectra show characteristic long-lifetimes due to ortho-positronium (o-Ps) formation and are well decomposed into 3 components with the time constants τ_i (i=1, 2, 3) and the relative intensities I_i (I_1+I_2+I_3=1). The τ_3 lifetime is about 1.7 ns, being nearly independent of the samples, while τ_2 is strongly dependent on the samples, ranging from 0.7 to 1.2 ns. Narrow peaks on the ACAR curves and the τ_3 lifetime give evidence of Ps formation in structural open-spaces (voids) with radius about 0.3nm. By neutron-irradiation the τ_2 lifetime has reduced to about 0.47 ns irrespective to the samples but its intensity (I_2) has increased with the dose. This component suggests positron trapping without Ps formation at irradiation-induced defects such as peroxy radicals. Annealing behavior of lifetime parameters is also presented and compared with previous ESR work. | |||||
| 書誌情報 |
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy 巻 40, 号 1, p. 203-209, 発行日 1994-09-16 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 00408808 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA00836167 | |||||
| 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 | Tohoku University | |||||
| 資源タイプ | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 紀要類(bulletin) | |||||
| 登録日 | ||||||
| 日付 | 2008-05-02 | |||||
| 日付タイプ | Created | |||||
| 公開日（投稿完了日） | ||||||
| 日付 | 2008-05-02 | |||||
| 日付タイプ | Created | |||||
| 発行日 | ||||||
| 日付 | 1994-09-16 | |||||
| 日付タイプ | Created | |||||
| フォーマット | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 784417 bytes | |||||
| 更新日 | ||||||
| 日付 | 2010-01-27 | |||||
| 日付タイプ | Created | |||||
