加速器质谱法（ａｃｃｅｌｅｒａｔｏｒ ｍａｓｓ ｓｐｅｃｔｒｏｍｅｔｒｙ，ＡＭＳ）是２０世纪７０年代末才在国际上兴起的一种超灵敏的核分析技术，主要用于测量样品中长寿命放射性核素和稳定核素的同位素丰度比，从而推断样品的年龄或进行示踪研究．与传统的衰变计数法相? Accelerator mass spectrometry (AMS), an ultrasensitive nuclear analysis technique that emerged internationally only in the late 1970s, is mainly used to measure the isotopic abundance of long-lived and stable radionuclides in samples To infer the age of the sample or to conduct a tracer study. Decay with the traditional method of counting?