摘要: <正> The Extraction of Actinium with 2-Ethyl-methyl Phosphonic Acid Mono-2-ethyl-hexyl Ester (HEHEHP). Feng Zheng-feng, Xu Jingming, Meng Zugui, ZhuYongjun (The Institute of Nuclear EnergyTechnology, Qinghua University)Pulsed CO_2 Laser Induced PhotosensitizedReaction in the SF_6-UF_6-CO System.Hou Huiqi, Qin Qizong, He Zhiqiang,Zhou Ping (Department of Nuclear Science,Fudan University)