引言用液体闪烁计数法测量放射性核素溶液的活度是一种比较精确的方法。该方法的主要优点是: (1)由于放射源与闪烁液均匀混合,无需作源自吸收的修正,故可测量高载体浓度的放射性溶液; (2)几乎可对所有的放射性核素进行测量; (3)制源快速且简单,并可避免升华和吸湿引起的误差; (4)一些修正通过外推到零能量而自然消失。我们这套测量装置已对β放射性核素溶液 Introduction Liquid scintillation counting of radionuclide solution activity is a more accurate method. The main advantages of this method are: (1) Radioactive solutions of high carrier concentration can be measured due to the uniform mixing of the radioactive source with the scintillation fluid without the need for modifications derived from absorption; (2) Measurement of all radionuclides is practically possible ; (3) the source is fast and simple, and errors due to sublimation and hygroscopicity can be avoided; and (4) some corrections disappear naturally by extrapolation to zero energy. Our set of measuring devices has been beta radionuclide solution