球形亚铁氰化钴钾-硅胶无机离子交换剂的制备及其用于<sup>137</sup>Cs-<sup>137m</sup>Ba发生器的研究

球形亚铁氰化钴钾-硅胶无机离子交换剂的制备及其用于¹³⁷Cs-^137mBa发生器的研究

摘要: 利用¹³⁷Cs-^137mBa的放射性级联衰变关系和¹³⁷Cs、^137mBa之间不同的化学性质，可以制备¹³⁷Cs-^137mBa核素发生器。本研究制备了球形亚铁氰化钴钾硅胶无机离子吸附材料，其对Cs⁺的静态吸附容量为0.311 mmol/g，吸附平衡常数为2.2×10⁴。用上述材料制备了活度为1.85×10⁹Bq(50 mCi)的用于工业示踪的^137mBa同位素发生器，淋洗效率大于50%，Cs⁺的漏穿率为10^-7/mL量级，使用寿命大于1年。该发生器性能稳定，使用寿命长。

Abstract: The mother-daughter relation and the different chemical properties between ¹³⁷Cs and ^137mBa makes it possible to prepare ¹³⁷Cs-^137mBa generator to obtain ^137mBa nuclides. The potassium cobalt hexacyanoferrate(Ⅱ) inorganic ion-exchanger supported on silica gel was prepared, its Cs⁺ static adsorption capacity was 0.311 mmol/g, and its adsorption equilibrium constant was 2.2×10⁴. The 1.85×10⁹ Bq (50 mCi) miniature generator was prepared, The elution efficiency was greater than 50%. The breakthrough of cesium was 10^-7 per milliliter of eluent. The service life was more than 1 year.