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一、引言放射性核素计量对于经济、军事及公众安全有着重要地位。世界范围内进行合作,提高放射性核素活度测量的准确度水平,已有近40年的历史。国内也有很多实验室从事这方面的工作。人们关心活度测量准确度在国际上达到的最高水平和国内水平的实际情况,以便作为今后计量工作发展和放射性核素应用工作的参考。
I. INTRODUCTION Radionuclide measurement plays an important role in economic, military and public safety. It has been nearly 40 years since the world-wide cooperation has been conducted to improve the accuracy of radionuclide activity measurement. There are many domestic laboratories in this area. People are concerned about the fact that the measurement accuracy of living degrees is at the highest international level and at the domestic level so as to serve as a reference for the future development of measurement work and application of radionuclides.