【作者】 何佳恒； 钟文彬； 姜林； 李兴亮； 王静； 马宗平；

【Author】 HE Jia-heng,ZHONG Wen-bin,JIANG Lin,LI Xing-liang,WANG Jing,MA Zong-ping (Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Miany ang 621900,China)

【机构】 中国工程物理研究院核物理与化学研究所；

【摘要】 碘在银丝上的吸附是¹²⁵I种子源制备过程中的一个重要环节。对碘在经特殊处理的银丝上的吸附工艺进行了研究,考察了卤化剂类型、卤化时间、吸附时间、pH、离子浓度、载体量等对吸附能力的影响,初步确定了碘在银粒上的吸附工艺。银丝的酸化:将银丝放入冷的4mol/L HNO₃溶液中,置于振荡器上酸化20 min;银丝的卤化:选择2 mol/L NaClO₃作为卤化剂,卤化时间3 h左右;碘在银丝上的吸附工艺:室温、pH≈3、吸附时间30 min、载体量27.5μg,根据对源芯活度的要求来选择吸附液初始活度。更多还原

【Abstract】 It is an important process that iodine’s adsorption on silver wire during the preparation of ¹²⁵I sources.In this paper, iodine’s adsorption technics on silver wire was studied.The influence of several factor（the type of agent for halogenation, the time for halogenation,the time for adsorption,pH value,ion concentration,carrier iodine and so on） on the use rate of ^l31I was investigated and confirmed iodine’s adsorption technics on silver silk.Silver wire’ acidification:used HNO₃（4 mol/L） as halogenation agent,vibrating acidificate for 20 min.Silver wire’ halogenation:used NaClO₃（2 mol/L） as halogenate agent, halogenate for 3 h.Iodine’s adsorption technics on silver wire:room temperature,pH value for the reaction was about 3,the time for adsorption was 30 min,carrier iodine was 27.5μg.Original radioactivity of reaction solution was decided based on radioactivity of source-core that user required.更多还原