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Analysis of short-range tracks and large track fluences in CR-39 PNTD using atomic force microscopy
https://repo.qst.go.jp/records/45715
https://repo.qst.go.jp/records/45715896f8981-32ee-42d6-a6b6-14b9475e96c9
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2010-01-05 | |||||
| タイトル | ||||||
| タイトル | Analysis of short-range tracks and large track fluences in CR-39 PNTD using atomic force microscopy | |||||
| 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 |
Johnson, Carl
× Johnson, Carl× Benton, Eric× Yasuda, Nakahiro× Benton, Eugene× 安田 仲宏 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The standard method of analysis used with CR-39 plastic nuclear track detector (PNTD)d chemical etching followed by visible light microscope scanningdis limited to fluences less than 105 cm-2 and to particles of rangew<8 mm (the minimum bulk etch needed to enlarge a track sufficiently to be measured using visible light). At fluences above 105 cm-2 the tracks begin to overlap, making analysis difficult. High-LET heavy nuclear recoil fragments often have ranges of 1–10 mm and bulk etch ≥8 mm results in over-etched tracks that are difficult to interpret. Both of these issues can be resolved by using a short etch (2–4 h 50 C, 6.25 N NaOH) followed by atomic force microscopy (AFM) analysis. The dimensions of the post-etch tracks are typically a few hundred nanometers, a size within the resolution of an AFM. Because AFM provides a 3-D topographical map of the post-etch PNTD surface, there is more useful information contained in an AFM image than in a standard image of the post-etch CR-39 surface obtained using an optical microscope and CCD camera. We are developing a method based on AFM scanning, followed by matrix analysis (as opposed to image processing), which allows us to directly extract the relevant geometrical parameters of the tracks in an AFM image. This method is also amenable to automation. Progress in developing this method is illustrated with results from AFM analysis of CR-39 PNTD exposed to high fluences of energetic protons at the Loma Linda University Medical Center (LLUMC) Proton Therapy Facility. | |||||
| 書誌情報 |
Radiation Measurements 巻 44, 号 9-10, p. 742-745, 発行日 2009-10 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1350-4487 | |||||
