Scintillation properties of Ce- and Eu-doped Ca2MgSi2O7 crystals

Scintillation properties of Ce- and Eu-doped Ca2MgSi2O7 crystals
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Ce 和 Eu 掺杂 Ca2MgSi2O7 晶体的闪烁特性

DOI:
10.1016/j.optmat.2018.12.056
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发表时间:
2019
期刊:
影响因子:
3.9
通讯作者:
Yanagida Takayuki
Yanagida Takayuki
中科院分区:
材料科学3区
文献类型:
--
作者:
Ogawa Taiki;Nakauchi Daisuke;Okada Go;Kawaguchi Noriaki;Yanagida Takayuki

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采用浮区法制备了掺Ce和Eu的Ca2MgSi2O7(CMSM)单晶。从X-射线衍射图可以看出,所有的CMSM样品都没有杂质相。在X射线辐照下,掺Ce和掺Eu的CMSM样品分别在390 nm和530 nm附近有较宽的发射。这些发射的来源被认为分别是Ce3+和Eu2+的5d-4f跃迁。在241Amγ-ray(59.5keV)下,掺Eu的CMSM样品的绝对光产额为11,000nph/MeV。此外,Ce和Eu掺杂样品的余辉特性与相应的热释光特性一致。
Ce- and Eu-doped Ca2MgSi2O7(CMSM) single crystals were synthesized by the Floating Zone method. From the X-ray diffraction patterns, we confirmed that all the CMSM samples have no impurity phases. Under X-ray irradiation, the Ce- and Eu-doped CMSM samples showed scintillation with a broad emission around 390 nm and 530 nm, respectively. The origin of these emissions was considered to be the 5d-4f transitions of Ce3+and Eu2+, respectively. The absolute light yield of the Eu-doped CMSM sample was 11,000 ph/MeV evaluated under241Am γ-ray (59.5 keV). In addition, afterglow properties of the Ce- and Eu-doped samples were consistent with the corresponding thermoluminescence properties.
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