2014 Fiscal Year Final Research Report
Breaking of the World record of light yield for Eu:SrI2 scintillator by control of valence using co-dopant
| Project/Area Number |
25600130
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
General applied physics
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | ハロゲン化物 / シンチレータ / 単結晶 |
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| Outline of Final Research Achievements |
Eu:SrI2 with high light yield and energy resolution have been investigated as a next-generation scintillator. We developed the novel crystal growth method for Eu:SrI2 single crystals and the crystals could be grown. However, the I vacancy in the crystal which is generated during crystal growth deteriorate the scintillation properties. Therefore, in this study, we grew trivalent cations (La, Gd, Lu) co-doped Eu:SrI2 single crystals and their scintillation properties were investigated.
La co-doped Eu:SrI2 crystals included maximum concentration of co-dopant. However, light yield of La co-doped Eu:SrI2 crystals decreased and the decrease of light yield was considered to be due to the decrease of light around 435 nm by an increase of emission around 500 nm.
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| Free Research Field |
結晶科学
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