放射系衰变图研究①雷洁李锦于群力（陕西师范大学物理学系，西安７１００６２；第一作者，男，５４岁，教授）放射性衰变是原子核的重要特性．人们很早就发现了４个较长的放射系，绘出了衰变图并研究了它们的特点，总结了放射衰变规律．但是，随着大量放射性核素的发现，... Radionuclide decay diagram Lei Jie Li Jin Yu Qunli (Department of Physics, Shaanxi Normal University, Xi’an 710062; first author, male, 54 years old, professor) Radioactive decay is an important characteristic of the nucleus. People have long found four long radioactive lines, painted the decay diagram and studied their characteristics, summarizes the rules of radioactive decay. However, with the discovery of a large number of radionuclides, ...