A carrier-free 124 Sb tracer was prepared for determining radioactive 125 Sb in highly contaminated and radioactive soil like one taken near the Fukushima Daiichi Nuclear Power Plant. The excitation function for the 124 Sb production was measured and compared to previous works to identify the optimum proton energy for the 124 Sn (p, n) reaction by a stack method. The maximum production of 124 Sb in the reaction was found at an incident proton beam energy of 8–9 MeV. Except for 124 Sb, the reaction produced short-lived by-products and practically no 125 Sb. Antimony was isolated from tin matrix by dissolving the irradiated target and extracting to isoamyl acetate. Then the carrier-free 124 Sb tracer solution was purified by passing it through an anion exchange resin column. The radioactivity of 124 Sb was recovered to more than 50% of the production, and provided successfully as a tracer solution free from tin due to the examined chemical procedure.

中文翻译：

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在 Sn (p, n) 反应中制备无载流子 124Sb 示踪剂

准备了无载体的124 Sb示踪剂，用于测定高度污染和放射性土壤中的放射性125 Sb，就像在福岛第一核电站附近所采取的那样。测量了 124 Sb 生产的激发函数，并与之前的工作进行了比较，以通过堆栈方法确定 124 Sn (p, n) 反应的最佳质子能量。在 8-9 MeV 的入射质子束能量下发现反应中 124 Sb 的最大产量。除124 Sb以外，该反应生成的产物寿命短，几乎没有125 Sb。通过溶解照射的靶标并萃取至乙酸异戊酯，从锡基质中分离出锑。然后将无载体的124 Sb示踪剂溶液通过阴离子交换树脂柱进行纯化。