| 热电离质谱直接测定铀氧化物中氧同位素 |
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| 引用本文： | 王同兴,张生栋,赵永刚,张燕,姜小燕,王晓明,任同祥,鹿捷.热电离质谱直接测定铀氧化物中氧同位素[J].原子能科学技术,2014,48(11):2106-2110. |
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| 作者姓名： | 王同兴 张生栋 赵永刚 张燕 姜小燕 王晓明 任同祥 鹿捷 |
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| 作者单位： | 1.中国原子能科学研究院 放射化学研究所，北京102413；2.核工业北京地质研究院，北京100029；3.中国计量科学研究院，北京100029 |
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| 摘 要： | 本文研究了热电离质谱（TIMS)直接测量粉末状铀氧化物中氧同位素的方法，涉及主要测量条件包括环境中氧、样品带材料、样品颗粒大小和测量方式等对测量结果的影响。对仪器的相关测量参数进行了优化，并建立了TIMS直接测量粉末状铀氧化物中18O、16O原子个数比的方法。对TIMS法与经典测量氧同位素的氧化法的测量结果进行了比较，两者的相对偏差为0.2%。TIMS法的18O、16O原子个数比测量精度优于0.28%。
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| 关 键 词： | 核取证 热电离质谱 氧同位素 铀氧化物 |
Direct Determination of Oxygen Isotope in Uranium Oxide by Thermal Ionization Mass Spectrometry |
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| WANG Tong-xing,ZHANG Sheng-dong,ZHAO Yong-gang,ZHANG Yan,JIANG Xiao-yan,WANG Xiao-ming,REN Tong-xiang,LU Jie.Direct Determination of Oxygen Isotope in Uranium Oxide by Thermal Ionization Mass Spectrometry[J].Atomic Energy Science and Technology,2014,48(11):2106-2110. |
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| Authors: | WANG Tong-xing ZHANG Sheng-dong ZHAO Yong-gang ZHANG Yan JIANG Xiao-yan WANG Xiao-ming REN Tong-xiang LU Jie |
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| Affiliation: | 1.China Institute of Atomic Energy, P. O. Box 275-8, Beijing 102413, China; 2.Beijing Research Institute of Uranium Geology, Beijing 100029, China; 3.National Institute of Metrology, Beijing 100029, China |
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| Abstract: | The thermal ionization mass spectrometry (TIMS) method for direct determination of the oxygen isotopic ratio in uranium oxide powders was established through eliminating the influence of oxygen in the environment, sample particle sizes, material of rhenium and tantalum filaments and measurement mode on results. The measurement parameters of mass spectrometer were optimized. The experimental results show that the relative deviation of TIMS method result and oxidation method result is 0.2%. The measuring precision of TIMS is better than 0.28%. |
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| Keywords: | nuclear forensics thermal ionization mass spectrometry oxygen isotope uranium oxide |
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