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同位素  2000 

电沉积法制备镅、钚和镎的α源

, PP. 135-135

Keywords: 电沉积,α放射源,~(141)Am,~(239)Pu,~(237)Np

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Abstract:

以0.1mol/L硫酸铵为电沉积液,在铂阳极与不锈钢阴极之间施加约15V直流电压,控制电流密度为0.65A/cm2,沉积40min,镅、钚和镎可以定量地沉积在阴极上,其收率均≥98%。探讨了18种有代表性的共存物对电沉积率的影响,结果表明,多数阳离子(碱金属、碱土金属除外)影响电沉积率或分辨率;少量NO-3、Cl-、磷酸三丁酯(TBP)、三烷基氧膦(TRPO)、煤油或草酸不影响沉积结果。当电解池中α核素的量≥0.25Bq、测量时间≥60min时,电沉积制源和α测量总的标准偏差可好于±4.0%。所选定的电沉积条件和步骤既适用于水相,也适用于有机相样品。

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