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DEGRADATION OF GAMMA-RAY IRRADIATED POLYETHYLENE FILMS STUDIED BY POSITRON ANNIHILATION
https://repo.qst.go.jp/records/72936
https://repo.qst.go.jp/records/72936eec2c6b8-2b32-4048-ab49-4366f2f60791
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-09-14 | |||||
| タイトル | ||||||
| タイトル | DEGRADATION OF GAMMA-RAY IRRADIATED POLYETHYLENE FILMS STUDIED BY POSITRON ANNIHILATION | |||||
| 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_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
岡, 壽崇
× 岡, 壽崇× 長澤, 尚胤× 木野, 康志× 関根, 勉× 長澤 尚胤 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Degradation of gamma-ray irradiated polyethylene films were studied by positron annihilation lifetime spectroscopy (PALS) using 22Na positron source. Application of PALS relies on the fact that some of the positrons injected into a polymer combine with an electron to form the hydrogen-like bound state, positronium. In a polymer, spin-parallel ortho-positronium (o-Ps) annihilates by pick-off annihilation in a free volume with one of the surrounding electrons and the lifetime of o-Ps increases with increasing hole size, so we can estimate the free volume size from the lifetime of o-Ps. The obtained results demonstrated that PALS can be useful as an indicator of the structural change induced by irradiation and long-term storage in HDPE. In the presentation, results for gamma-ray were compared with the results for electron-beam polyethylene to discuss the difference of the radiation. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | The 10th International Conference of Modification, Degradation and Stabilization of Polymers (MoDeSt2018) | |||||
| 発表年月日 | ||||||
| 日付 | 2018-09-04 | |||||
| 日付タイプ | Issued | |||||
