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Construction of a surface positronium lifetime spectroscopy apparatus with a spin-polarized low energy positron beam
https://repo.qst.go.jp/records/48056
https://repo.qst.go.jp/records/480566f244b44-b54f-40a5-86dd-0f2a585cce8c
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-06-15 | |||||
| タイトル | ||||||
| タイトル | Construction of a surface positronium lifetime spectroscopy apparatus with a spin-polarized low energy positron beam | |||||
| 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 | |||||
| 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 |
前川, 雅樹
× 前川, 雅樹× 和田, 健× 宮下, 敦巳× 河裾, 厚男× 前川 雅樹× 和田 健× 宮下 敦巳× 河裾 厚男 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | For the study of surface magnetic phenomena using the spin-polarized positron annihilation method, we developed a surface positronium (Ps) lifetime spectrometer. A spin-polarized slow positron beam is generated by a sodium-22 source and a solid Krypton moderator and transported to the sample chamber by electrostatic lenses. Incident energy is adjusted by a retarding potential using a deceleration tube. For the lifetime measurement, the start signal is obtained from a secondary-electron detector installed in front of the sample. The stop signal is detected by a scintillation detector for annihilation gamma ray. As the performance test, Ps lifetime measurements were carried out and clear decay curves derived from ortho-Ps self-annihilation were successfully observed. This system might be used for the estimation of the spin polarization at the surface of the ferromagnetic materials. | |||||
| 書誌情報 |
Journal of Physics: Conference Series 巻 791, 号 1, p. 012009-1-012009-5, 発行日 2017-02 |
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| 出版者 | ||||||
| 出版者 | IOP publishing | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1088/1742-6596/791/1/012009 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://iopscience.iop.org/article/10.1088/1742-6596/791/1/012009 | |||||
| 関連名称 | http://iopscience.iop.org/article/10.1088/1742-6596/791/1/012009 | |||||
