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Thermoluminescence study of irradiated lithium orthosilicate

A Abramenkovs, E Kaschejva, V Grishmanovs, S Tanaka1998年Fusion Engineering and DesignIF 1.7出版社

AbstractThe thermoluminescental investigations of neutron and gamma irradiated lithium orthosilicate pellets were carried out. It has been shown that the addition of Cr3+ and Fe3+ ions with the total concentration up to 2.0 wt.% during preparation of lithium orthosilicate pellets, significantly reduces the formation of radiation defects in irradiated matrix. This phenomena can be explained by the reducing of the formation of primary radiation defects during irradiation due to stimulating the recombination processes by the ions of impurities. Several ion concentration combinations were studied. The thermoluminescental investigations of fast neutron irradiated lithium orthosilicate pellets in the presence of external magnetic fields were carried out. It has been shown that the magnetic field increases the role of more thermal stable peaks in the total thermoluminescence yield.

日本語訳

中性子およびガンマ線照射されたオルソケイ酸リチウムペレットの熱ルミネセンス調査を実施した。調製中のオルソケイ酸リチウムペレットへのCr3+およびFe3+イオンの添加(総濃度2.0 wt.%まで)が、照射マトリックスにおける放射線欠陥の形成を有意に低減することが示された。この現象は、不純物イオンによる再結合プロセスの促進によって、照射中の一次放射線欠陥の形成が低減されることにより説明できる。いくつかのイオン濃度の組み合わせを検討した。外部磁場の存在下における高速中性子照射オルソケイ酸リチウムペレットの熱ルミネセンス調査を実施した。磁場が総熱ルミネセンス収量におけるより熱的に安定なピークの寄与を増大させることが示された。

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