重离子辐射的ＤＮＡ链断裂效应袁雄叶常青周平坤重离子系指原子序数（Ｚ）等于和大于２的原子被剥掉或部分剥掉外周电子后带正电荷的原子核。随着人类向外层空间的拓展和放射治疗的应用，重离子的生物效应研究日益受到重视。但对重离子生物效应的研究远远少于对电子、光子... Heavy Chain Ions, Heavy Ion Radiation YUAN Xiong, YE Changqing, ZHOU Pingkun Heavy ion is a nucleus with positive charges after the atoms with atomic number (Z) equal to or greater than 2 are stripped or partially stripped of the peripheral electrons. With the development of human beings to the outer space and the application of radiation therapy, the biological effects of heavy ions have drawn more and more attention. However, the study of heavy ion biological effects is far less than that of electrons, photons ...