《Table 2 Results of 13C-/12C-for three sample preparation methods》
本系列图表出处文件名:随高清版一同展现
《中国原子能科学研究院加速器质谱实验室的~(14)C样品制备技术研究进展》
In order to satisfy 14C measurement with the new developed 200kV single stage electrostatic accelerator mass spectrometer,the sample preparation processes for 14C were investigated.The graphitization experimental conditions for H2-Fe,Zn-Fe and Zn-H-Fe methods were optimized on self-designed 14C sample preparation system.The beam current of 12C-for all prepared samples can reach 15-40μA and its stability is better than0.2%.The 14C measurement shows that the lower ratio of(12CH-+13C-)/12 C-benefits the high sensitive and miniaturization device.The result also shows that the Zn-Fe method can depress the ratio of(12CH-+13C-)/12C-for the samples with the carbon content less than 1mg,while,for the carbon content among 1 mg to5mg,the Zn-Fe and Zn-H-Fe methods have the equivalent effect.Through above preparation methods,the yield of carbon can reach more than95%for the carbon content of 100μg-5mg.
图表编号 | XD0027847300 严禁用于非法目的 |
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绘制时间 | 2019.07.01 |
作者 | 庞义俊、赵庆章、何明、姜山、杨旭冉、武绍勇、张宇轩、于波、胡畔 |
绘制单位 | 核物理研究所 |
更多格式 | 高清、无水印(增值服务) |