Control on the response of radiation-induced phosphors for heavy charged particles
Project/Area Number |
18H01911
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 31010:Nuclear engineering-related
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Research Institution | Tohoku University |
Principal Investigator |
Asai Keisuke 東北大学, 工学研究科, 教授 (60231859)
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Co-Investigator(Kenkyū-buntansha) |
越水 正典 東北大学, 工学研究科, 准教授 (40374962)
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Project Period (FY) |
2018-04-01 – 2021-03-31
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Project Status |
Completed (Fiscal Year 2020)
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Budget Amount *help |
¥15,600,000 (Direct Cost: ¥12,000,000、Indirect Cost: ¥3,600,000)
Fiscal Year 2020: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2019: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2018: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
|
Keywords | 重粒子線 / 線エネルギー付与 / シンチレータ / 熱蛍光体 / 励起状態間相互作用 / 輝尽蛍光 / 熱蛍光 / ラジオフォトルミネッセンス / 線量計 / エネルギー移動 / シンチレーション |
Outline of Final Research Achievements |
Unique energy deposition characteristics of heavy charged particles should be taken into account in the measurements of them. They deposit energy densely along their trajectories, and the energy density per unit length along the trajectory, i.e., linear energy tranfer (LET), is used to express the energy deposition characteristics. In this study, we revealed the basic processes responsible for the LET-dependent response of phosphors used for radiation detection. The LET-dependent of scintillators depends on the species of the excited states responsible for scintillation. On the contrary, in the case of thermally stimulated luminescence phosphors, the LET dependence can be controlled via the concentrations of the trap sites of electrons and holes.
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Academic Significance and Societal Importance of the Research Achievements |
本研究で得られた知見は、学術的には、重粒子線計測に用いる放射線誘起蛍光体において、所望のLET依存性を実現するための実験指針となる。このことは、重粒子線計測における技術的基盤となる。本研究を通じた重粒子線計測の高度化により、主に重粒子線治療における線量およびその分布の計測、あるいは正確なエネルギー付与計測は、重粒子線を用いた医療の高度化に資するものである。
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Report
(4 results)
Research Products
(28 results)
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[Journal Article] "Neutron detection via thermoluminescence of Tb3+-doped Li2O-Al2O3-B2O3 glasses"2021
Author(s)
Ichiro Kawamura, Hiroki Kawamoto, Yutaka Fujimoto, Masanori Koshimizu, Go Okada, Genichiro Wakabayashi, Mitsuhiro Nogami, Keitaro Hitomi, Kenichi Watanabe, Takayuki Yanagida, Keisuke Asai
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Journal Title
Jpn. J. Appl. Phys.
Volume: 60
Issue: 3
Pages: 036002-036002
DOI
Related Report
Peer Reviewed
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[Journal Article] "Neutron detection via thermoluminescence of Ce3+-doped CaO-Al2O3-B2O3 glass"2020
Author(s)
Ichiro Kawamura, Hiroki Kawamoto, Hiromi Kimura, Hajime Komiya, Yutaka Fujimoto, Masanori Koshimizu, Go Okada, Yusuke Koba, Ryo Ogawara, Mitsuru Suda, Genichiro Wakabayashi, Takayuki Yanagida, Keisuke Asai
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Journal Title
Mater. Technol.
Volume: 印刷中
Issue: 12
Pages: 2063-2072
DOI
Related Report
Peer Reviewed
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[Journal Article] "Thermoluminescence properties of Dy3+-doped CaO-Al2O3-B2O3 glasses for neutron detection"2020
Author(s)
Ichiro Kawamura, Hiroki Kawamoto, Yutaka Fujimoto, Masanori Koshimizu, Go Okada, Yusuke Koba, Ryo Ogawara, Mitsuru Suda, Takayuki Yanagida, Keisuke Asai,
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Journal Title
Nucl. Instrum. Methods Phys. Res. B
Volume: 468
Pages: 18-18
DOI
Related Report
Peer Reviewed
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[Presentation] " LET-dependent thermoluminescence of Y3Al5O12:Ce "2019
Author(s)
Masanori Koshimizu, Go Okada, Yuho Hirata, Daisuke Nakauchi, Takumi Kato, Noriaki Kawaguchi, Kenichi Watanabe, Yusuke Koba, Yutaka Fujimoto, Takayuki Yanagida,Keisuke Asai,
Organizer
The 19th International Conference on Solid State Dosimetry (SSD19)
Related Report
Int'l Joint Research
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