介绍了在加速器质谱学中发展的入射离子X射线的探测技术，以便应用于测定中重同位素的同量异位素鉴别．描述了在中国原子能科学研究院加速器质谱计上建立的入射离子X射线探测装置和实验结果.通过测量入射离子X射线，实现了64Cu测量中对同量异位素64Ni和64Zn的鉴别，以及79Se 测量中对79Br的鉴别．
In recent years, a new technique to detect the charteristic X-ray from projectile ions in accelerator mass spectrometry (AMS) has been developed. After analysis in the routine AMS system, the ions are stopped in an appropriately chosen target in steat of anion detector and induced X-ray are detected for identification of ions by atomic number. For the application of AMS to higher mass isotopes with mass number＞20 using small accelerator, the characteristic X-rays technique is better than the energy loss method for identification of atomic isobars. For analysis of heavy isotopes, a detection system of projectile X-ray has been set up at the China Institute of Atomic Energy for identification of isobars in the AMS. Some of results in recent measurement of 64Cu and 79Se were reported here. The 64Cu ions were separated from its isobars, 64Ni and 64Cu, and 79Se ions were separated from 79Br.
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