. 2006, 24(0609): 36-37.
14- MeV neutrons could induce the exotic(n, 2p) reaction of heavy nuclear. The heary ion of kighter mass with intermediate energy bombardment of heavy nucleus could produce multinuclear transfer reaction. The physics idea and technical route for production, separation, and identification in the synthesis and study of new heavy neutron-rich nuclides were formed based on the mentioned above. The radiochemical separation and X-γ coincidence methods (element separation method) are introduced. Some new heavy neutron-rich nuclides such as 185Hf, 186Hf, 237Th, 238Th, 239Pa, 175Er, and 197Os were successively synthesized. Their half-life were determined to be 3.5 min, 2.6 min, 5.0 min, 9.4 min, 106 min, 2.8 min, and 1.2 min, respectively. And their other decay properties such as new γ rays and partial decay scheme were observed.
