与测量其它核素相比 ,用加速器质谱进行1 4 Ｃ测量需要达到较高的测量精度才能满足考古、地学等应用领域的需要。北京大学加速器质谱计 (ＰＫＵＡＭＳ)在 1993年建成并投入运行时1 4 Ｃ的测量精度为 1%。之后 ,ＰＫＵＡＭＳ在进行应用研究的同时 ,不断进行1 4 Ｃ测年精度的改进 Comparing with other radionuclides, the use of accelerator mass spectrometry for 1 4 C measurement requires a higher measurement accuracy to meet the needs of archeology, geosciences and other applications. Peking University Accelerator Mass Spectrometry (PKUAMS) was built and put into operation in 1993 1 4 C measurement accuracy of 1%. Afterwards, PKUAMS continuously improved the accuracy of 1 4 C dating while applying the research