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CR-39を用いた高エネルギー荷電粒子が人体内中に生成する短飛程二次粒子の線量寄与の研究
https://repo.qst.go.jp/records/65648
https://repo.qst.go.jp/records/65648cd72ce27-29e9-46a6-ba98-33cfed031a51
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-04-24 | |||||
| タイトル | ||||||
| タイトル | CR-39を用いた高エネルギー荷電粒子が人体内中に生成する短飛程二次粒子の線量寄与の研究 | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 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 |
小平, 聡
× 小平, 聡× 小西, 輝昭× 北村, 尚× 内堀, 幸夫× Benton, Eric× 小平 聡× 小西 輝昭× 北村 尚× 内堀 幸夫× Ｂｅｎｔｏｎ Ｅｒｉｃ |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In addition to energy loss bay ionization process, protons of energy >~50 MeV, such as those used in proton radiotherapy, can undergo nuclear interactions with nuclei of Z >1, resulting in the production of short range (<10 μm), high-LET (liner energy transfer) target fragment particles. One of the few methods to detect these short-range particles is by means of CR-39 plastic nuclear track detector analyzed with an atomic force microscope. However, doe to the LET-dependent angular sensitivity of CR-39, multiple detectors exposed at a range of incident angles to the primary proton beam, must be analyzed in order accurately detemine the LET spectrum, absorbed dose and dose equivalent. The LET spectrum of 160MeV proton induced secondary particles was exprrimentally measured with CE-39, which were exposed at six different incident angles to take into account the intrinsic sensitivity of the critical angle for track registration. The irradiated detectors were chemically processed to remove a 1 μm thick volume of CR-39, The measured LET range of short range tracks was from 15keV/μm up to 1.5MeV/μm. The absorbed dose contribution (Ds/Dp) from secondary particles to primary proton dose was ~1%, while the dose equivalent contribution (Hs/Dp) was found to be ~20%. |
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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 | 平成26年度HIMAC共同利用研究成果発表会 | |||||
| 発表年月日 | ||||||
| 日付 | 2015-04-21 | |||||
| 日付タイプ | Issued | |||||
