摘要
Abstract
To enhance the atomization efficiency of technetium in laser resonance ionization mass spectrometry(LRIMS),a metal source was fabricated by electroplating the target element onto a metal strip in its atomic form.In this study,rhenium,an element with similar properties to technetium,was selected as a surrogate.Through the comparative studies of various electroplating systems,it was determined that the H2SO4-(NH4)2C2O4 system was the most suitable for electroplating rhenium metal.Based on this finding,the electroplating process parameters that might affect the electroplating yield,such as ammonium oxalate concentration,sulfuric acid concentration,electro-plating temperature,current value,and electroplating duration,were individually optimized to ensure effective dep-osition of the target nuclide and improve the utilization rate of the sample.Ultimately,it was determined that in a mixed solution of 0.5 mol/L ammonium oxalate and 0.05 mol/L sulfuric acid,electroplating at a current of 200 mA for a duration of 180 minutes at a temperature of 50℃ can yield a small-area rhenium metal measurement source.Under these optimized conditions,the electroplating yield of rhenium remained stable at over 57％,provi-ding an effective reference for the subsequent preparation of a technetium source.关键词
同量异位素/激光共振电离质谱/测量源/原子化效率/锝/铼/小面积/电镀Key words
isobar/laser resonance ionization mass spectrometry/measurement source/atomization efficiency/technetium/rhenium/small area/electroplate分类
化学化工
