太阳中微子、宇宙暗物质以及稀有粒子的探测是国际上重要研究课题。实验中,探测器材料以及探测器屏蔽材料内存在的40K以及U、Th系列等放射性核素产生的放射性严重地影响对中微子以及暗物质的测量。本工作首次采用加速器质谱方法测量中微子探测器材料(CsI和液体闪烁体)中40K的含 The detection of solar neutrinos, cosmic dark matter and rare particles is an important international research topic. In the experiment, the radioactivity produced by the detector material and 40K and U, Th series radionuclides present in the shielding material of the detector seriously affected the measurement of neutrinos and dark matter. This work first used accelerator mass spectrometry to measure the content of 40K in the neutron detector material (CsI and liquid scintillator)