Fast recovery by dry distillation of 75Br induced in reusable metal selenide targets via the 76Se(p,2n)75Br reaction

The International journal of applied radiation and isotopes Pub Date : 1985-12-01 DOI:10.1016/0020-708X(85)90256-X

W. Vaalburg, A.M.J. Paans, J.W. Terpstra, T. Wiegman, K. Dekens, A. Rijskamp, M.G. Woldring

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引用次数: 24

Abstract

A number of metal selenides were investigated as target material for the production of ⁷⁵Br by the ⁷⁶Se(p,2n)⁷⁵Br reaction. Ag₂Se, CuAgSe, and Cu₂Se met the rqquirements for an economical and fast production procedure. These selenides were found to be stable during bombardment with 1–4 μA 28 MeV protons (beam dimension 0.4 cm²) and at the dry distillation temperature of 1473 K. A target system was developed for radiobromine production with a 7 μA 28−22 MeV proton beam on Cu₂Se. At EOB the calculated thick target yield is 1.59 GBq/μAh (43 mCi/μAh) and the radionuclidic purity is 98.6%. The radiobromine was separated from Cu₂Se by dry distillation at 1473 K and collected for 80–95% on platinum wool pretreated with CaCl₂. Radiochemical analysis showed the radiobromine to be Br⁻ for 95% and BrO₃⁻ for 5%. The total loss of selenide after irradiation and distillation was found to be less than 0.1%.

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用76Se(p,2n)75Br反应快速回收可重复使用金属硒化靶中的75Br

研究了几种金属硒化物作为76Se(p,2n)75Br反应制备75Br的靶材料。Ag2Se, CuAgSe和Cu2Se满足经济快速生产过程的要求。这些硒化物在1 ~ 4 μA 28 MeV质子轰击(束径0.4 cm2)和1473 K干馏温度下是稳定的。用7 μA 28−22 MeV质子束在Cu2Se上制备放射性溴。在EOB条件下，计算得到的厚靶产率为1.59 GBq/μAh (43 mCi/μAh)，放射性核素纯度为98.6%。用干馏法在1473 K下将放射性溴从Cu2Se中分离出来，并在CaCl2预处理的铂羊毛上收集80-95%。放射化学分析表明，放射性溴为Br−占95%，BrO3−占5%。经辐照和蒸馏后硒化物的总损失量小于0.1%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The International journal of applied radiation and isotopes

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