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Improvement of charge resolution for high Z/b particles in CR-39 nuclear track detectors by means of two-step etching technique
https://repo.qst.go.jp/records/46254
https://repo.qst.go.jp/records/46254e6489d3f-45db-4c6d-89dd-5bc84616bbd7
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2012-01-17 | |||||
| タイトル | ||||||
| タイトル | Improvement of charge resolution for high Z/b particles in CR-39 nuclear track detectors by means of two-step etching technique | |||||
| 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 |
Kodaira, Satoshi
× Kodaira, Satoshi× Naka, Shuichiro× Yasuda, Nakahiro× Kawashima, Hajime× Kurano, Mieko× Ota, Syuya× Ideguchi, Yusuke× Hasebe, Nobuyuki× Ogura, Kouichi× 小平 聡× 仲 秀一郎× 安田 仲宏× 川嶋 元× 蔵野 美恵子× 太田 周也× 井手口 悠介 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We verified that the two-step etching method of the combination of pre-etching with PEW (Potassium hydroxide + Ethanol + Water) solution and post-etching with NaOH solution makes drastic improvement of charge resolution for high Z/b particles (Z: nuclear charge, b: velocity) in CR-39 nuclear track detectors. Detectors were exposed to several heavy ions from Ne to Kr with the energies of <500 MeV/n at HIMAC (Heavy Ion Medical Accelerator in Chiba). The optimum etching conditions were determined to be a preetching of PEW solution with concentration of 60 wt% of ethanol for 40 min and a post-etching of 7N NaOH for 12 h. This resulted in a charge resolution for Kr (Z/b~60) of 0.18 c.u. (charge units). The Z/b detection threshold was increased as a function of ethanol concentration in PEW pre-etching solutions. We found that the two-step etching method would be useful technique for the precise charge identification by a single track measurement. The 60 wt% ethanol concentration in PEW would be adequate selection for the purpose of trans-iron nuclei measurement discriminating abundant light nuclei in galactic cosmic rays. |
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| 書誌情報 |
Nuclear Instruments & Methods in Physics Research Section B 巻 274, p. 36-41, 発行日 2012-03 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0168-583X | |||||
