放射性这一名词是指某些核素发射辐射核粒子,并经受自发变化的能力。这些辐射在穿过物质时失去它们的能量并产生离子、电子和光子。放射性计量就是基于探测这些二级产物。它的目的是测定每秒核转化(通常称为衰变)的平均数,即源的活度。 放射性计量工作包括制备放射源,即放射性 The term radioactivity refers to the ability of certain radionuclides to emit radiative nuclei and undergo spontaneous changes. These radiation lose their energy and produce ions, electrons and photons as they pass through matter. Radioactive metrology is based on the detection of these secondary products. Its purpose is to determine the average number of nuclear transformations per second (often called decay), that is, the activity of the source. Radioactive metrology includes the preparation of radioactive sources, namely radioactive