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Simultaneous production of highly-pure $$^{76,77}$$Br and $$^{79}$$Kr using an isotope separator

同位体分離器を用いた高純度$$^{76,77}$$Br,$$^{79}$$Krの同時製造法の開発

石岡 典子; Fateh, B.*; 渡辺 智; 関根 俊明*; 久米 民和

Ishioka, Noriko; Fateh, B.*; Watanabe, Satoshi; Sekine, Toshiaki*; Kume, Tamikazu

A production method of the bromine radioisotopes $$^{76}$$Br and $$^{77}$$Br in high radiochemical purity has been developed without using an isotopically enriched target, instead, their precursors $$^{76}$$Kr and $$^{77}$$Kr produced in a NaBr target by proton irradiation were mass-separated and implanted into Al foils together with $$^{79}$$Kr by means of a high-resolution isotope separator. The isotope separation efficiencies of the radiokryptons with a compact ECR ion source were found to be 15%. The $$^{79}$$Kr was recovered cryogenically from the Al foil heated, while $$^{76}$$Kr and $$^{77}$$Kr were allowed to decay for 14.6 h and 1.24 h, respectively during which the almost maximum growth of $$^{76}$$Br and $$^{77}$$Br occurred. A comparison was made between anion and cation exchange methods for chemical separation of the radiobromines from the Al foils. The recovery efficiencies were found to be almost identical between then, and better than 95%.

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English

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発表会議名

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6th International Symposium on Advanced Science Research; Frontiers of Nuclear and Radiochemistry (ASR 2006)

開催年月

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2006/10

開催都市

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Tokai

開催国

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Japan

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no keyword

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研究データの公開先DOI

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使用施設

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TIARA(イオン照射研究施設)

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論文解説記事
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