| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-01-08 |
| タイトル |
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タイトル |
High linear energy transfer (LET) nature of alanine radical yield by soft X-ray irradiations studied by electron spin resonance (ESR) applications |
|
言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Seiko Nakagawa
Yokoya Akinari
Ohara Maki
Noriko Usami
Mizue Asada
Motoyasu Fujiwara
Toshikazu Nakamura
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| 抄録 |
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内容記述タイプ |
Abstract |
|
内容記述 |
Radicals produced in alanine by irradiation of 2 ? 7 keV X-rays were investigated
by ESR applications; i.e., CW-ESR, pulse-ESR and ESR imaging. The relative radical yield decreased with the decreasing photon energy and the increasing dose. The 2D imaging showed that the radical concentration at the surface was extremely low even though the absorption of X-rays exponentially decreased with the penetration depth. The depth of the radical concentration peak was almost the same as the penetration depth for the X-ray irradiation with an energy lower than 5-keV. The product formed by radical recombination was observed by an LC/MS (liquid chromatograph-mass spectrum) analysis. For the soft X-ray irradiation, many radicals will be lost by the efficient radical-radical recombination due to the higher density of the radicals, similar to the high-LET irradiation by heavy ions. The converse of the spin-spin relaxation time (T2), which correlates with the radical concentration, increased by the decreasing photon energy. The values of 1/T2 for the soft X-rays were compatible to that for the heavy ions with the high-LET. Based on these observations, it was concluded that irradiation by soft X-rays should be the high-LET irradiation. |
| 書誌情報 |
Radiation Physics and Chemistry
巻 214,
p. 111304,
発行日 2023-09
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| 出版者 |
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出版者 |
Elsevier |
| ISSN |
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|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
1879-0895 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1016/j.radphyschem.2023.111304 |
